Properties of the Number 28687

Twenty-Eight Thousand Six Hundred Eighty-Seven

Basics

Value: 28686 → 28687 → 28688

Parity: odd

Prime: Yes

Previous Prime: 28669

Next Prime: 28697

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 28687

Divisors: 1, 28687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000000001111

Octal: 70017

Duodecimal: 14727

Hexadecimal: 700f

Square: 822943969

Square Root: 169.37237082830245

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 (18^k - 5^k)/13 is prime. A128353

Beginnings of maximal chains of primes with four members (three links). A152867

Positions of check bits in code in A075940. A75942

Primes for which the weight as defined in A117078 is 11 and the gap as defined in A001223 is 10. A119596

Primes p such that 8·p²-2·p-1 divides Fibonacci(p). A159231

Number of pure 2-complexes on 7 unlabeled nodes with n multiple 2-simplexes. A50912

Primes that remain prime through 4 iterations of function f(x) = 4x + 9. A23312

Grundy function for turn-at-most-7-coins game. A54044

(5ⁿ)-th prime. A55680

Numbers n such that prime(n) + reversal(prime(n)) is a square. A227371