Properties of the Number 28647

Twenty-Eight Thousand Six Hundred Forty-Seven

Basics

Value: 28646 → 28647 → 28648

Parity: odd

Prime: No

Previous Prime: 28643

Next Prime: 28649

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 1061

Divisors: 1, 3, 9, 27, 1061, 3183, 9549, 28647

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111100111

Octal: 67747

Duodecimal: 146B3

Hexadecimal: 6fe7

Square: 820650609

Square Root: 169.25424662323837

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 k and k+1 are both of the form p·q³ where p and q are distinct primes. A215173

G.f.: ∏_k>=1 (1 + 2·x^k²) / (1-x^k). A280224

a(n) = number of isogeny classes of abelian surfaces over the finite field of order prime(n). A362198

Numbers whose arithmetic derivatives are a permutation of their digits. A225902

a(1) = 3, a(n + 1) = 1 + a(n) + least odd prime factor of a(n). A144751

Expansion of (theta₃(z)*theta₃(20z)+theta₂(z)*theta₂(20z))³. A28647