Properties of the Number -15804

Fifteen Thousand Eight Hundred Four

Basics

Value: -15805 → -15804 → -15803

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 439

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 36, 439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110110111100

Octal: -36674

Duodecimal: -9190

Hexadecimal: -3dbc

Square: 249766416

Square Root: 125.71396103854178

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

T(n,k)=Number of lower triangles of an n X n 0..k array with each element unequal to the sum mod k+1 of its horizontal and vertical neighbors. A194505

Expansion of (∏_j>=1 (1-(-x)^j) - 1)⁹ in powers of x. A1487

Numbers k such that prime(k+3)-(k+3)*τ(k+3) = prime(k-3)-(k-3)*τ(k-3) where τ(k) = A000005(k) is the number of divisors of k. A67355

Capless binary boundary codes for holeless strictly non-overlapping polyhexes, only the maximal representative from each equivalence class obtained by rotating. A258004

Numbers m such that there are an equal number of numbers <= m that are contained and that are not contained in the concatenation of terms <= m in A048991. A105391

Capless binary boundary codes for fusenes, maximal representative from each equivalence class up to rotation. A258014

E.g.f. satisfies A(x) = 1/(1 - log(1 + x·A(x)²)). A367136

Numbers n that divide the sum of digits of 36ⁿ. A220364

Number of n X 4 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A223834

Number of tilings of a 6 X n rectangle using integer-sided square tiles of area > 1. A226370