Properties of the Number 28505

Twenty-Eight Thousand Five Hundred Five

Basics

Value: 28504 → 28505 → 28506

Parity: odd

Prime: No

Previous Prime: 28499

Next Prime: 28513

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 5701

Divisors: 1, 5, 5701, 28505

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111101011001

Octal: 67531

Duodecimal: 145B5

Hexadecimal: 6f59

Square: 812535025

Square Root: 168.8342382338369

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

Pseudo-random numbers: a (very weak) pseudo-random number generator from the second edition of the C book. A61364

a(n) = a(n-1)*a(n-3)+1 with a(0)=a(1)=a(2)=0. A121253

Number of partitions of n with equal number of parts congruent to each of 3 and 4 (mod 5). A35561

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (1, -1, 0), (1, 0, 1)}. A149885

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, 1, -1), (0, 0, 1), (1, -1, 0), (1, 0, 1)}. A149886

Expansion of ∏_k>=2 (1 + x^Fibonacci(k))^Fibonacci(k). A291650

Number of primes <= 100·n. A28505

E.g.f. satisfies: A(x) = ∑_n>=0 xⁿ/n! * ∏_k=1..n A(k·x)^1/k. A230318