Properties of the Number -1904

Nine Hundred Four

Basics

Value: -1905 → -1904 → -1903

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

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

Today's Target

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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

Dirichlet inverse of A011782, 2^n-1. A349452

Expansion of (1-x)/(1-2x+6x²). A138229

Irregular triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of (1-x)/(x²-3x+1)). A328646

a(n) = coefficient of x^2·n in A(x) = 1 + ∑_n>=1 (-1)ⁿ * x^4·n² * (F(x/2)^2·n + F(-x/2)^2·n), where F(x) is the g.f. of A357787. A357806

Determinant of the n X n matrix whose element (i,j) equals the |i-j|-th composite number, or 0 if i=j. A71081

Dirichlet g.f.: ζ(s-2)² * (1 - 2^3-s) / ζ(s). A368929

a(n) = (n-1)*(n+3) - 2ⁿ + 4. A71099

Expansion of 1/(1+2·x+2·x²-2·x³). A77991

Expansion of ∏_k>=1 (1 + x^3·k)^3·k / (1 + x^k)^k. A285294