Properties of the Number 40657

Forty Thousand Six Hundred Fifty-Seven

Basics

Value: 40656 → 40657 → 40658

Parity: odd

Prime: No

Previous Prime: 40639

Next Prime: 40693

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 109 × 373

Divisors: 1, 109, 373, 40657

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111011010001

Octal: 117321

Duodecimal: 1B641

Hexadecimal: 9ed1

Square: 1652991649

Square Root: 201.63581031156147

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 benzenoids with 22 hexagons, C_2v symmetry and containing n carbon atoms. A123106

Expansion of e.g.f. exp( x·exp(x²) ). A216688

a(n) = n! * ∑_{k=0..floor(n/3)} k^k / (k! * (n-3·k)!). A362348

Numbers m such that k = m·23² divides 3^k-1 - 2^k-1. A130058

Numerators of the partial alternating sums of the reciprocals of the powerful part function (A057521). A379585

a(n) = 5·a(n-1) + 3·a(n-2) where a(0) = a(1) = 1. A111365

Continued fraction for sqrt(684). A40657