Properties of the Number 26991

Twenty-Six Thousand Nine Hundred Ninety-One

Basics

Value: 26990 → 26991 → 26992

Parity: odd

Prime: No

Previous Prime: 26987

Next Prime: 26993

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 2999

Divisors: 1, 3, 9, 2999, 8997, 26991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110100101101111

Octal: 64557

Duodecimal: 13753

Hexadecimal: 696f

Square: 728514081

Square Root: 164.28937884111681

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

a(n) = (1+n)*(9 + 11·n + 4·n²)/3. A172482

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 809", based on the 5-celled von Neumann neighborhood. A273612

Expansion of e.g.f. exp(x+x²-1/6·x³). A200380

Self-convolution of array T given by A026692. A26991