Properties of the Number 15800

Fifteen Thousand Eight Hundred

Basics

Value: 15799 → 15800 → 15801

Parity: even

Prime: No

Previous Prime: 15797

Next Prime: 15803

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 5 ² × 79

Divisors: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11110110111000

Octal: 36670

Duodecimal: 9188

Hexadecimal: 3db8

Square: 249640000

Square Root: 125.69805089976535

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

Number T(n,k) of collections of nonempty multisets with a total of n objects of exactly k colors; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A255903

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the maximum plus the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. A238155

Place n equally spaced points on each side of a square, and join each of these points by a chord to the 3·n new points on the other three sides: sequence gives number of edges in the resulting planar graph. A367279

Numbers n such that n | sigma₁₃(n). A55717

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of these n·k points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of edges in the resulting planar graph. A367305

Expansion of g.f. satisfying A(x) = A( x·A(x)⁴ + 5·x*A(x)⁵ )^1/5. A370546

Numbers k such that 7·2^k - 3 is prime. A58593

Numbers k such that usigma(k) = φ(k)*ω(k), where ω(k) is the number of distinct prime divisors of k. A63795

Number of collections of nonempty multisets with a total of 2n objects of exactly n colors. A255907

Number of collections of nonempty multisets with a total of n objects of exactly four colors. A255944