38 (thirty-eight) is the
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
37 and preceding
39.
In mathematics
*38
! − 1 yields which is the 16th
factorial prime
A factorial prime is a prime number that is one less or one more than a factorial (all factorials greater than 1 are even).
The first 10 factorial primes (for ''n'' = 1, 2, 3, 4, 6, 7, 11, 12, 14) are :
: 2 (0! + 1 or 1! + 1) ...
.
*There is no answer to the equation
φ(''x'') = 38, making 38 a
nontotient
In number theory, a nontotient is a positive integer ''n'' which is not a totient number: it is not in the range of Euler's totient function φ, that is, the equation φ(''x'') = ''n'' has no solution ''x''. In other words, ''n'' is a nontotie ...
.
*
37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.
*38 is the largest even number which cannot be written as the sum of two odd
composite numbers
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, or ...
.
*The sum of each row of the only non-trivial (order 3)
magic hexagon
A magic hexagon of order ''n'' is an arrangement of numbers in a centered hexagonal number, centered hexagonal pattern with ''n'' cells on each edge, in such a way that the numbers in each row, in all three directions, sum to the same magic constan ...
is 38.
In science
*The
atomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of its atomic nucleus. For ordinary nuclei composed of protons and neutrons, this is equal to the proton number (''n''p) or the number of pro ...
of
strontium
Strontium is a chemical element; it has symbol Sr and atomic number 38. An alkaline earth metal, it is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is exposed to ...
Astronomy
*The
Messier object
The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ' (''Catalogue of Nebulae and Star Clusters''). Because Messier was interested only in finding comets, he created a list of th ...
M38, a
magnitude
Magnitude may refer to:
Mathematics
*Euclidean vector, a quantity defined by both its magnitude and its direction
*Magnitude (mathematics), the relative size of an object
*Norm (mathematics), a term for the size or length of a vector
*Order of ...
7.0
open cluster
An open cluster is a type of star cluster made of tens to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and ...
in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The first constellati ...
Auriga
Auriga is a constellation in the northern celestial hemisphere. It is one of the 88 modern constellations; it was among the 48 constellations listed by the 2nd-century astronomer Ptolemy. Its name is Latin for '(the) charioteer', associating i ...
*The
New General Catalogue
The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxy, galaxies, star cluste ...
object
NGC 38, a
spiral galaxy
Spiral galaxies form a galaxy morphological classification, class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae'' in the constellation
Pisces
Pisces may refer to:
*Pisces (astrology), an astrological sign
Astronomy
*Pisces (constellation), a constellation
** Pisces Overdensity, an overdensity of stars in the Milky Way's halo that is situated in the Pisces constellation
** Pisces II, a ...
In other fields
Thirty-eight is also:
* The
38th parallel north
Following are circles of latitude between the 35th parallel north and the 40th parallel north:
36th parallel north
The 36th parallel north is a circle of latitude that is 36 degrees north of the Earth's equatorial plane. It crosses Africa, th ...
is the pre-
Korean War
The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
boundary between
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and borders China and Russia to the north at the Yalu River, Yalu (Amnok) an ...
and
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...
.
* The number of slots on an American
roulette
Roulette (named after the French language, French word meaning "little wheel") is a casino game which was likely developed from the Italy, Italian game Biribi. In the game, a player may choose to place a bet on a single number, various grouping ...
wheel (0, 00, and 1 through 36; European roulette does not use the 00 slot and has only 37 slots)
* The
Ishihara test
The Ishihara test is a color vision test for detection of red–green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917.S. Ishihara, Tests for c ...
is a
color vision test
A color vision test is used for measuring color vision against a standard. These tests are most often used to diagnose color vision deficiencies ("CVD"; color blindness''), though several of the standards are designed to categorize normal color vis ...
consisting of 38
pseudoisochromatic plates
A color vision test is used for measuring color vision against a standard. These tests are most often used to diagnose color vision deficiencies ("CVD"; color blindness''), though several of the standards are designed to categorize normal color vi ...
.
* A "38" is often the name for a snub nose
.38 caliber revolver.
* The
38 class is the most famous class of
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
used in
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
*
Gerald Ford
Gerald Rudolph Ford Jr. (born Leslie Lynch King Jr.; July 14, 1913December 26, 2006) was the 38th president of the United States, serving from 1974 to 1977. A member of the Republican Party (United States), Republican Party, Ford assumed the p ...
, 38th
President of the United States
The president of the United States (POTUS) is the head of state and head of government of the United States. The president directs the Federal government of the United States#Executive branch, executive branch of the Federal government of t ...
*
Arnold Schwarzenegger
Arnold Alois Schwarzenegger (born July30, 1947) is an Austrian and American actor, businessman, former politician, and former professional bodybuilder, known for his roles in high-profile action films. Governorship of Arnold Schwarzenegger, ...
, 38th
Governor of California
The governor of California is the head of government of the U.S. state of California. The Governor (United States), governor is the commander-in-chief of the California National Guard and the California State Guard.
Established in the Constit ...
, most recent
Republican governor of
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
, and the second governor to be born outside of the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
*Cats have a total of 38 chromosomes in their genome.
* Number used by
Zane Smith and
Front Row Motorsports
Front Row Motorsports (FRM) is an American professional stock car racing team that currently competes in the NASCAR Cup Series and NASCAR Craftsman Truck Series. The team began running part-time in 2004 as Means-Jenkins Motorsports under a part ...
to win the
2022 NASCAR Camping World Truck Series
The 2022 NASCAR Camping World Truck Series was the 28th season of the NASCAR Camping World Truck Series, a stock car racing series sanctioned by NASCAR in the United States. The season started with the NextEra Energy 250 on February 18 at ...
championship.
See also
*
List of highways numbered 38
The following highways are numbered 38:
Australia
* A38 (Sydney)
Canada
* Alberta Highway 38
* Ontario Highway 38 (former)
* Saskatchewan Highway 38
Czech Republic
* I/38 Highway (Czech Republic), I/38 Highway; Czech: :cz:Silnice I/38, Silnic ...
References
{{Integers, zero
Integers