Properties of the Number 26631

Twenty-Six Thousand Six Hundred Thirty-One

Basics

Value: 26630 → 26631 → 26632

Parity: odd

Prime: No

Previous Prime: 26627

Next Prime: 26633

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 269

Divisors: 1, 3, 9, 11, 33, 99, 269, 807, 2421, 2959

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100000000111

Octal: 64007

Duodecimal: 134B3

Hexadecimal: 6807

Square: 709210161

Square Root: 163.19007322750977

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

Numbers k such that σ(k) = σ(k+7). A15867

Number of odd-length integer partitions of n with a unique mode. A363726

Number of graphical basis partitions of 2n. A1130

If n mod 3 = 0 then a(n) = 3^n/3 + 12·n, if n mod 3 = 1 then a(n) = 4·3^(n-4/3) + 12·n + 51, otherwise a(n) = 2·3^(n-2/3) + 12·n - 36. A276401

Expansion of ∏_k>0 (1 + ∑_m>=0 x^{k·2^m}). A304393

Partial sums of Wagstaff numbers A000978. A172296

a(n) = A026626(2·n-1, n-2). A26631

Triangle of number of connected graphs with k >= 1 edges and n nodes (2 <= n <= k+1). A46742

E.g.f.: x / LambertW( x/(1-x) ). A352411