Properties of the Number 28517

Twenty-Eight Thousand Five Hundred Seventeen

Basics

Value: 28516 → 28517 → 28518

Parity: odd

Prime: Yes

Previous Prime: 28513

Next Prime: 28537

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 28517

Divisors: 1, 28517

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111101100101

Octal: 67545

Duodecimal: 14605

Hexadecimal: 6f65

Square: 813219289

Square Root: 168.8697723099075

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

Primes from merging of 5 successive digits in decimal expansion of sqrt(2). A198165

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 10. A31423

a(n) = ((6·n + 10)/27)*2^n-1 + ((-1)^n-1)*(6·n + 5)/27. A127976

Molien series for invariants of finite Coxeter group A₁₀. A266779

Primes p such that 14·p + 1 divides 2^p - 1. A350702

Crystal ball sequence for squashed {D₅}^* lattice, perhaps the smallest example of a "non-superficial" lattice. A10025

Numbers k such that the continued fraction for sqrt(k) has period 71. A20410

Primes of the form 3·k² + 9·k + 5. A171838

Integers k such that 2^k-1 == 1 (mod k) and 2^m-1 == 1 (mod m), where m = k*(A000265(k-1) - 1) + 1 and A000265 gives the odd part of its argument. A187849

Number of 3 X n 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing. A229446