38 (number)
Natural number
From Wikipedia, the free encyclopedia
38 (thirty-eight) is the natural number following 37 and preceding 39.
| ||||
|---|---|---|---|---|
| Cardinal | thirty-eight | |||
| Ordinal | 38th (thirty-eighth) | |||
| Factorization | 2 × 19 | |||
| Divisors | 1, 2, 19, 38 | |||
| Greek numeral | ΛΗ´ | |||
| Roman numeral | XXXVIII, xxxviii | |||
| Binary | 1001102 | |||
| Ternary | 11023 | |||
| Senary | 1026 | |||
| Octal | 468 | |||
| Duodecimal | 3212 | |||
| Hexadecimal | 2616 | |||
In mathematics
- 38! − 1 yields 523022617466601111760007224100074291199999999 which is the 16th factorial prime.[1]
- There is no answer to the equation φ(x) = 38, making 38 a nontotient.[2]
- 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.
- The sum of each row of the only non-trivial (order 3) magic hexagon is 38.[3]
In science
- The atomic number of strontium
Astronomy
- The Messier object M38, a magnitude 7.0 open cluster in the constellation Auriga
- The New General Catalogue object NGC 38, a spiral galaxy in the constellation Pisces
In other fields
Thirty-eight is also:
- The 38th parallel north is the pre-Korean War boundary between North Korea and South Korea.[4]
- The number of slots on an American roulette wheel (0, 00, and 1 through 36; European roulette does not use the 00 slot and has only 37 slots)
- The Ishihara test is a color vision test consisting of 38 pseudoisochromatic plates.[5]
- A "38" is often the name for a snub nose .38 caliber revolver.
- The 38 class is the most famous class of steam locomotive used in New South Wales
- Gerald Ford, 38th President of the United States
- Arnold Schwarzenegger, 38th Governor of California, most recent Republican governor of California, and the second governor to be born outside of the United States
- Cats have a total of 38 chromosomes in their genome.
- Number used by Zane Smith and Front Row Motorsports to win the 2022 NASCAR Camping World Truck Series championship.