Properties of the Number 71644

Seventy-One Thousand Six Hundred Forty-Four

Basics

Value: 71643 → 71644 → 71645

Parity: even

Prime: No

Previous Prime: 71633

Next Prime: 71647

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 17911

Divisors: 1, 2, 4, 17911, 35822, 71644

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011111011100

Octal: 213734

Duodecimal: 35564

Hexadecimal: 117dc

Square: 5132862736

Square Root: 267.6639684380399

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 partitions of 2·n with no part divisible by 3 and all odd parts occurring with even multiplicities. A98151

Expansion of φ(q³) / φ(q) in powers of q where φ() is a Ramanujan θ function. A132002

Largest number of maximal planar node-induced subgraphs of an n-node graph. A342213

a(n) = A005148(2ⁿ-1)/8^n-1. A71644