Properties of the Number 28508

Twenty-Eight Thousand Five Hundred Eight

Basics

Value: 28507 → 28508 → 28509

Parity: even

Prime: No

Previous Prime: 28499

Next Prime: 28513

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 7127

Divisors: 1, 2, 4, 7127, 14254, 28508

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111101011100

Octal: 67534

Duodecimal: 145B8

Hexadecimal: 6f5c

Square: 812706064

Square Root: 168.8431224539513

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 (mod D₄) ways to place 2 nonattacking knights on an n X n board. A243717

a(n) = (1/4) * ∑_{k=0..floor(n/2)} (k+2) * binomial(2·k+2,2·n-4·k+1). A391830

Smallest of 5 consecutive integers divisible respectively by 5 consecutive primes. A72730

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 0, -1), (0, 1, 0), (1, -1, 1)}. A148391

a(n) is the number of n-place formulas in first-order logic when variables are allowed to coincide. A300696

Continued fraction expansion for log₂(5). A28508

Triangle T(n, k) = 2 + n! - k! - (n-k)!, read by rows. A156045

Table(n,k) of binary strings of length n which have the same number of k long 0...00 and 0...01 substrings, where n>=0 and k>=2, read by downwards antidiagonals. A371692