Properties of the Number 28605

Twenty-Eight Thousand Six Hundred Five

Basics

Value: 28604 → 28605 → 28606

Parity: odd

Prime: No

Previous Prime: 28603

Next Prime: 28607

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 1907

Divisors: 1, 3, 5, 15, 1907, 5721, 9535, 28605

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111110111101

Octal: 67675

Duodecimal: 14679

Hexadecimal: 6fbd

Square: 818246025

Square Root: 169.130127416732

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

Unary-binary representation of Stern polynomials: a(n) = A156552(A260443(n)). A277020

Odd bisection of A277020: a(n) = A277020(2n+1). A277189

Number of nonprimes <= prime(n)². A53683

Composite numbers k such that φ(k)^φ(k) == k + 1 (mod k²). A319370

Expansion of (theta₃(z)*theta₃(10z)+theta₂(z)*theta₂(10z)). A28605