Properties of the Number 1904

One Thousand Nine Hundred Four

Basics

Value: 1903 → 1904 → 1905

Parity: even

Prime: No

Previous Prime: 1901

Next Prime: 1907

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ⁴ × 7 × 17

Divisors: 1, 2, 4, 7, 8, 14, 16, 17, 28, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101110000

Octal: 3560

Duodecimal: 1128

Hexadecimal: 770

Square: 3625216

Square Root: 43.634848458542855

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

Expansion of ∏_k>=1 (1 - k·x^k)^k. A266964

Number of flat partitions of n: partitions {a_i} with each |a_i - a_i-1| <= 1. A34296

|First digit - second digit + third digit - fourth digit ...| = 12. A60980

a(0)=0, a(1)=1, a(2)=2; for n > 2, a(n) = 3·a(n-1) - a(n-2) - 2·a(n-3). A27934

Triangle of numbers a(n,k) = number of Young tableaux with n cells and k rows (1 <= k <= n); also number of self-inverse permutations on n letters in which the length of the longest scattered (i.e., not necessarily contiguous) increasing subsequence is k. A47884

Generalized Gaussian Fibonacci integers. A88137

Numbers n such that φ(46,n) is prime, where φ is the cyclotomic polynomial. A250193

Triangle, read by rows, where the n-th row lists the (2n+1) coefficients of (1+x+2x²)ⁿ for n >= 0. A84600

Numbers with 20 divisors. A30638

Product of the 4th power of a prime and 2 different distinct primes (p⁴*q·r). A179644