natural number
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...
following 39 and preceding 41.
Though the word is related to ''four'' (4), the spelling ''forty'' replaced ''fourty'' during the 17th century and is now the standard form.
Mathematics
40 is an
abundant number
In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The integer 12 is the first abundant number. Its proper divisors are 1, 2, 3, 4 and 6 for a total ...
.
Swiss mathematician
Leonhard Euler
Leonhard Euler ( ; ; ; 15 April 170718 September 1783) was a Swiss polymath who was active as a mathematician, physicist, astronomer, logician, geographer, and engineer. He founded the studies of graph theory and topology and made influential ...
noted 40 prime numbers generated by the
quadratic polynomial
In mathematics, a quadratic function of a single variable is a function of the form
:f(x)=ax^2+bx+c,\quad a \ne 0,
where is its variable, and , , and are coefficients. The expression , especially when treated as an object in itself rather tha ...
, with values . These forty prime numbers are the same prime numbers that are generated using the polynomial with values of from 1 through 40, and are also known in this context as ''Euler's "lucky" numbers''.
Forty is the only integer whose English name has its letters in alphabetical order.
In religion
The number 40 is found in many traditions without any universal explanation for its use. In
Jewish
Jews (, , ), or the Jewish people, are an ethnoreligious group and nation, originating from the Israelites of History of ancient Israel and Judah, ancient Israel and Judah. They also traditionally adhere to Judaism. Jewish ethnicity, rel ...
,
Christian
A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the wo ...
,
Islam
Islam is an Abrahamic religions, Abrahamic monotheistic religion based on the Quran, and the teachings of Muhammad. Adherents of Islam are called Muslims, who are estimated to number Islam by country, 2 billion worldwide and are the world ...
ic, and other
Middle Eastern
The Middle East (term originally coined in English language) is a geopolitical region encompassing the Arabian Peninsula, the Levant, Turkey, Egypt, Iran, and Iraq.
The term came into widespread usage by the United Kingdom and western Eur ...
umpteen
Indefinite and fictitious numbers are words, phrases and quantities used to describe an indefinite size, used for comic effect, for exaggeration, as placeholder names, or when precision is unnecessary or undesirable. Other descriptions of this con ...
".
Sumerian
Enki
Enki ( ) is the Sumerian god of water, knowledge ('' gestú''), crafts (''gašam''), and creation (''nudimmud''), and one of the Anunnaki. He was later known as Ea () or Ae p. 324, note 27. in Akkadian (Assyrian-Babylonian) religion, and ...
( /ˈɛŋki/) or Enkil (Sumerian: dEN.KI(G)𒂗𒆠) is a god in Sumerian mythology, later known as Ea in Akkadian and Babylonian mythology. He was originally patron god of the city of
Eridu
Eridu (; Sumerian: eridugki; Akkadian: ''irîtu'') was a Sumerian city located at Tell Abu Shahrain (), also Abu Shahrein or Tell Abu Shahrayn, an archaeological site in Lower Mesopotamia. It is located in Dhi Qar Governorate, Iraq, near the ...
, but later the influence of his cult spread throughout
Mesopotamia
Mesopotamia is a historical region of West Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. Today, Mesopotamia is known as present-day Iraq and forms the eastern geographic boundary of ...
and to the
Canaanites
{{Cat main, Canaan
See also:
* :Ancient Israel and Judah
Ancient Levant
Hebrew Bible nations
Ancient Lebanon
0050
Ancient Syria
Wikipedia categories named after regions
0050
0050
Phoenicia
Amarna Age civilizations ...
,
Hittites
The Hittites () were an Anatolian peoples, Anatolian Proto-Indo-Europeans, Indo-European people who formed one of the first major civilizations of the Bronze Age in West Asia. Possibly originating from beyond the Black Sea, they settled in mo ...
and
Hurrians
The Hurrians (; ; also called Hari, Khurrites, Hourri, Churri, Hurri) were a people who inhabited the Ancient Near East during the Bronze Age. They spoke the Hurrian language, and lived throughout northern Syria, upper Mesopotamia and southeaste ...
. He was the deity of crafts (gašam); mischief; water, seawater, lake water (a, aba, ab), intelligence (gestú, literally "ear") and creation (Nudimmud: nu, likeness, dim mud, make bear). He was associated with the southern band of constellations called stars of Ea, but also with the constellation AŠ-IKU, the Field (
Square of Pegasus
Pegasus is a constellation in the northern sky, named after the winged horse Pegasus in Greek mythology. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and is one of the IAU designated constellations, 88 constel ...
). Beginning around the second millennium BCE, he was sometimes referred to in writing by the numeric ideogram for "40", occasionally referred to as his "sacred number".
Judaism
* In the
Hebrew Bible
The Hebrew Bible or Tanakh (;"Tanach" . '' Michael David Coogan, ''A Brief Introduction to the Old Testament: The Hebrew Bible in Its Context'', Oxford, 2008, p. 116
* Rain fell for "forty days and forty nights" during the Flood (Genesis 7:4).
* Noah waited for forty days after the tops of mountains were seen after the flood, before releasing a raven (Genesis 8:5–7).
* Spies were sent by Moses to explore the land of Canaan (promised to the children of Israel) for "forty days" (Numbers 13:2, 25).
* The Hebrew people lived in the lands outside of the promised land for "forty years". This period of years represents the time it takes for a new generation to arise (Numbers 32:13).
* Several early Hebrew leaders and kings are said to have ruled for "forty years", that is, a generation. Examples include Eli (1 Samuel 4:18), Saul (Acts 13:21), David (2 Samuel 5:4), and Solomon (1 Kings 11:42).
*
Goliath
Goliath ( ) was a Philistines, Philistine giant in the Book of Samuel. Descriptions of Goliath's giant, immense stature vary among biblical sources, with texts describing him as either or tall. According to the text, Goliath issued a challen ...
challenged the Israelites twice a day for forty days before
David
David (; , "beloved one") was a king of ancient Israel and Judah and the third king of the United Monarchy, according to the Hebrew Bible and Old Testament.
The Tel Dan stele, an Aramaic-inscribed stone erected by a king of Aram-Dam ...
defeated him (1 Samuel 17:16).
*
Moses
In Abrahamic religions, Moses was the Hebrews, Hebrew prophet who led the Israelites out of slavery in the The Exodus, Exodus from ancient Egypt, Egypt. He is considered the most important Prophets in Judaism, prophet in Judaism and Samaritani ...
spent three consecutive periods of "forty days and forty nights" on
Mount Sinai
Mount Sinai, also known as Jabal Musa (), is a mountain on the Sinai Peninsula of Egypt. It is one of several locations claimed to be the Mount Sinai (Bible), biblical Mount Sinai, the place where, according to the sacred scriptures of the thre ...
:
# He went up on the seventh day of
Sivan
''Sivan'' (, from Akkadian ''simānu'', meaning "season; time") is the ninth month of the civil year and the third month of the religious year on the Hebrew calendar. It is a month of 30 days. ''Sivan'' usually falls in May–June on the Grego ...
, after
God
In monotheistic belief systems, God is usually viewed as the supreme being, creator, and principal object of faith. In polytheistic belief systems, a god is "a spirit or being believed to have created, or for controlling some part of the un ...
gave the Torah to the Jewish people, in order to learn the Torah from God, and came down on the seventeenth day of Tammuz, when he saw the Jews worshiping the
Golden Calf
According to the Torah, the Bible, and the Quran, the golden calf () was a cult image made by the Israelites when Moses went up to Mount Sinai (bible), Mount Sinai. In Hebrew, the incident is known as "the sin of the calf" (). It is first mentio ...
and broke the tablets (Deuteronomy 9:11).
# He went up on the eighteenth day of Tammuz to beg forgiveness for the people's sin and came down without God's atonement on the twenty-ninth day of Av (Deuteronomy 9:25).
# He went up on the first day of
Elul
Elul (Hebrew language, Hebrew: , Hebrew language#Modern Hebrew, Standard , Tiberian vocalization, Tiberian ) is the twelfth month of the civil year and the sixth month of the Jewish religious year, religious year in the Hebrew calendar. It is a m ...
and came down on the tenth day of
Tishrei
Tishrei () or Tishri (; ''tīšrē'' or ''tīšrī''; from Akkadian ''tašrītu'' "beginning", from ''šurrû'' "to begin") is the first month of the civil year (which starts on 1 Tishrei) and the seventh month of the ecclesiastical year (wh ...
, the first
Yom Kippur
Yom Kippur ( ; , ) is the holiest day of the year in Judaism. It occurs annually on the 10th of Tishrei, corresponding to a date in late September or early October.
For traditional Jewish people, it is primarily centered on atonement and ...
, with God's atonement (Deuteronomy 10:10).
* A
mikvah
A mikveh or mikvah (, ''mikva'ot'', ''mikvot'', or ( Ashkenazic) ''mikves'', lit., "a collection") is a bath used for ritual immersion in Judaism to achieve ritual purity.
In Orthodox Judaism, these regulations are steadfastly adhered t ...
consists of 40 '' se'ah'' (approximately ) of water
* The prophet
Elijah
Elijah ( ) or Elias was a prophet and miracle worker who lived in the northern kingdom of Israel during the reign of King Ahab (9th century BC), according to the Books of Kings in the Hebrew Bible.
In 1 Kings 18, Elijah defended the worsh ...
had to walk 40 days and 40 nights before arriving at
mount Horeb
Mount Horeb (; Hebrew: ''Har Ḥōrēḇ''; Greek in the Septuagint: , ''Chōrēb''; Latin in the Vulgate: ') is the mountain at which the Ten Commandments were given to Moses by God, according to the Book of Deuteronomy in the Hebrew Bible. I ...
(1 Kings 19:8).
* 40 lashes is one of the punishments meted out by the
Sanhedrin
The Sanhedrin (Hebrew and Middle Aramaic , a loanword from , 'assembly,' 'sitting together,' hence ' assembly' or 'council') was a Jewish legislative and judicial assembly of either 23 or 70 elders, existing at both a local and central level i ...
(Deuteronomy 25:3), though in actual practice only 39 lashes were administered.
* (Numbers 14:33–34) alludes to the same with ties to the prophecy in The Book of Daniel. "For forty years—one year for each of the forty days you explored the land—you will suffer for your sins and know what it is like to have Me against you."
* One of the prerequisites for a man to study Kabbalah is that he is forty years old.
* "The registering of these men was carried on cruelly, zealously, assiduously, from the rising of the sun to its going down, and was not brought to an end in forty days" (3 Maccabees 4:15).
*
Jonah
Jonah the son of Amittai or Jonas ( , ) is a Jewish prophet from Gath-hepher in the Northern Kingdom of Israel around the 8th century BCE according to the Hebrew Bible. He is the central figure of the Book of Jonah, one of the minor proph ...
warns
Nineveh
Nineveh ( ; , ''URUNI.NU.A, Ninua''; , ''Nīnəwē''; , ''Nīnawā''; , ''Nīnwē''), was an ancient Assyrian city of Upper Mesopotamia, located in the modern-day city of Mosul (itself built out of the Assyrian town of Mepsila) in northern ...
that "Forty days more, and Nineveh shall be overthrown." (Jonah 3:4)
Islam
*
Prophet Muhammad
In Islam, Muhammad () is venerated as the Seal of the Prophets who transmitted the Quran, eternal word of God () from the Angels in Islam, angel Gabriel () to humans and jinn. Muslims believe that the Quran, the central religious text of Isl ...
was forty years old when he first received the revelation delivered by the archangel Gabriel. The
Quran
The Quran, also Romanization, romanized Qur'an or Koran, is the central religious text of Islam, believed by Muslims to be a Waḥy, revelation directly from God in Islam, God (''Allah, Allāh''). It is organized in 114 chapters (, ) which ...
states that a person reaches the age of maturity at 40.Koran
Al-Ahqaf
Al-Ahqaf (, ; "the sand dunes" or "the winding sand tracts") is the 46th chapter (''surah'') of the Qur'an with 35 verses ('' ayat''). This is the seventh and last chapter starting with the Muqattaʿat letters '' Hāʼ Mīm''. Regarding the t ...
:15
Hinduism
In
Hinduism
Hinduism () is an Hypernymy and hyponymy, umbrella term for a range of Indian religions, Indian List of religions and spiritual traditions#Indian religions, religious and spiritual traditions (Sampradaya, ''sampradaya''s) that are unified ...
, some popular religious prayers consist of forty
shloka
Shloka or śloka ( , from the root , Macdonell, Arthur A., ''A Sanskrit Grammar for Students'', Appendix II, p. 232 (Oxford University Press, 3rd edition, 1927).) in a broader sense, according to Monier-Williams's dictionary, is "any verse or stan ...
s or dohas (couplets, stanzas). The most common being the
Hanuman Chalisa
The ''Hanuman Chalisa'' (Hindi: हनुमान चालीसा) (Sanskrit: हनुमान् चालीसा) (; '' Forty chaupais on Hanuman'') is a Hindu devotional hymn ('' stotra'') in praise of Hanuman, and popularly recited ...
(''chaalis'' is the Hindi term for 40).
In the Hindu system some of the popular fasting periods consist 40 days and is called the period One 'Mandala Kalam' Kalam means a period and Mandala Kalam means a period of 40 days. For example, the devotees (male and female) of Swami Ayyappa, the name of a Hindu god very popular in Kerala, India (Sabarimala Swami Ayyappan) strictly observed forty days fasting and visit (since female devotees of a certain biological age group would not be able to perform the continuous 40-day-austerities, they would not enter into the god's temple until September 2018) with their holy submission or offerings on 41st or a convenient day after a minimum 40 days practice of fasting. The offering is called "Kaanikka".
In other fields
Forty is also:
*
Kyrgyzstan
Kyrgyzstan, officially the Kyrgyz Republic, is a landlocked country in Central Asia lying in the Tian Shan and Pamir Mountains, Pamir mountain ranges. Bishkek is the Capital city, capital and List of cities in Kyrgyzstan, largest city. Kyrgyz ...
is a country in Central Asia and is derived from the Kyrgyz word meaning "Land of forty tribes". The number 40 is significant in Kyrgyz traditions and appears in many areas of Kyrgyz culture.
* In Tamil literary tradition, 40 (nāṟpatu: நாற்பது) and 400 (nāṉūṟu: நானூறு) have a special significance. Many short works of the post-Sangam period have 40 poems. Some well-known works with 40 poems are naṉṉeṟi, iṉṉā nāṟpatu, kaḷavaḻi nāṟpatu, iṉiyavai nāṟpatu, kār nāṟpatu.
*The number of years of marriage celebrated by the ruby
wedding anniversary
A wedding anniversary is the anniversary of the date that a wedding took place. Couples often mark the occasion by celebrating their relationship, either privately or with a larger party. Special celebrations and gifts are often given for partic ...
*
Forty-shilling freeholders
Forty-shilling freeholders were those who had the parliamentary franchise to vote by virtue of possessing freehold property, or lands held directly of the king, of an annual rent of at least forty shillings (i.e. £2 or 3 marks), clear of all ...
, a nickname, given to those who qualified for a franchise, the right to vote, based on their interest in land and/or property with an annual rental value of 40s. Introduced in England in 1430, it applied there and in many associated territories, in various forms, up to 1918.
* Forty is the only number, when written in English, whose letters appear in alphabetical order.