Properties of the Number 1938

One Thousand Nine Hundred Thirty-Eight

Basics

Value: 1937 → 1938 → 1939

Parity: even

Prime: No

Previous Prime: 1933

Next Prime: 1949

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 17 × 19

Divisors: 1, 2, 3, 6, 17, 19, 34, 38, 51, 57

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110010010

Octal: 3622

Duodecimal: 1156

Hexadecimal: 792

Square: 3755844

Square Root: 44.02272140611028

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = binomial(n+3, 3)/4 for odd n, n*(n+2)*(n+4)/24 for even n. A6918

Products of exactly four distinct primes. A46386

Number of ways to choose a strict partition of each part of a strict partition of n. A279785

Number of points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n² + 2. A5899

a(n) = n² + 2. A59100

a(n) = 2·binomial(n,3). A7290

a(n) = 2*(3·n)! / ((2·n+1)!*(n+1)!). A139

Numbers k such that k²⁵⁶ + 1 is prime. A56995

Multiples of 19 containing a 19 in their decimal representation. A121039

Number of integer partitions of n having a part that can be written as a nonnegative linear combination of the other (possibly equal) parts. A364913