Properties of the Number 71640

Seventy-One Thousand Six Hundred Forty

Basics

Value: 71639 → 71640 → 71641

Parity: even

Prime: No

Previous Prime: 71633

Next Prime: 71647

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 5 × 199

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001011111011000

Octal: 213730

Duodecimal: 35560

Hexadecimal: 117d8

Square: 5132289600

Square Root: 267.6564962783455

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 inequivalent ways to color the edges of a tetrahedron using at most n colors so that no color appears more than twice. A282820

a(n) = (n+1)*(n+2)²*(n+3)²*(n+4)*(2·n² + 6·n + 5)/720. A108645

a(n) = ∑_i=1..n A040051(i). A71640