Properties of the Number 81388

Eighty-One Thousand Three Hundred Eighty-Eight

Basics

Value: 81387 → 81388 → 81389

Parity: even

Prime: No

Previous Prime: 81373

Next Prime: 81401

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 20347

Divisors: 1, 2, 4, 20347, 40694, 81388

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110111101100

Octal: 236754

Duodecimal: 3B124

Hexadecimal: 13dec

Square: 6624006544

Square Root: 285.28582158950695

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

Triangle read by rows: T(n,w) is the number of n-step self avoiding walks on a 3D cubic lattice confined between two infinite planes a distance 2w apart where the walk starts at the middle point between the planes. A338125

Numbers whose base-5 representation has exactly 8 runs. A43608

Number of unitary prime divisors of the n-th Catalan number. A81388