Properties of the Number 8644

Eight Thousand Six Hundred Forty-Four

Basics

Value: 8643 → 8644 → 8645

Parity: even

Prime: No

Previous Prime: 8641

Next Prime: 8647

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 2161

Divisors: 1, 2, 4, 2161, 4322, 8644

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111000100

Octal: 20704

Duodecimal: 5004

Hexadecimal: 21c4

Square: 74718736

Square Root: 92.97311439335567

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 of reduced words of length n in the Weyl group D₂₀. A162359

Numbers k such that k²⁵⁶ + 1 is prime. A56995

Numbers n such that the decimal number concat(6,n) is a square. A273361

Numbers that are the sum of ten fourth powers in exactly eight ways. A345860

Relative of Hofstadter Q-sequence: a(n) = max(0, n+4315) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A373237

Vertical of triangular spiral in A051682. A81271

Some numbers of the form 2·x³ + y³ + z³ found by a certain algorithm. A195006

E.g.f.: (cosh(3·x) + sinh(3·x)*cosh(x)) / (cosh(x) - sinh(x)*cosh(3·x)). A245155

Expansion of ∏_k>=1 ((1 - k·x^k) / (1 - x^k)). A267005

Number of bipartite partitions of n white objects and 4 black ones. A465