Properties of the Number 28512

Twenty-Eight Thousand Five Hundred Twelve

Basics

Value: 28511 → 28512 → 28513

Parity: even

Prime: No

Previous Prime: 28499

Next Prime: 28513

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁵ × 3 ⁴ × 11

Divisors: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111101100000

Octal: 67540

Duodecimal: 14600

Hexadecimal: 6f60

Square: 812934144

Square Root: 168.85496735364347

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 with an even number of prime factors (counted with multiplicity) that can be factored into squarefree semiprimes (A320911) but cannot be factored into distinct semiprimes (A320892). A320893

Triangle read by rows: T(n, k) = [z^k] P(n, z) where P(n, z) = ∑_k=0..n binomial(n, k) * Pochhammer(n - k + c, k) * z^k / k! and c = 4. A62145

Coordination sequence for 4-dimensional cubic lattice (points on surface of 4-dimensional cross-polytope). A8412

a(n) = 22·n². A195323

Coordination sequence for C₄ lattice. A19560

Numbers formed by interpreting the reduced residue set of every even number as a Zeckendorf Expansion. A54433

Triangle T(n, k, q) = (q+1)*binomial(n, k)*(Pochhammer(q+1, n)/(Pochhammer(q+1, k)*Pochhammer(q+1, n-k))), with T(n, 0) = T(n, n) = 1, and q = 2, read by rows. A174125

Numbers with prime factorization pq^4r^5. A190468

Numbers with a record number of distinct values of the Euler totient function applied to their divisors (A319696). A328858

The number of ways one can flip seven consecutive tails (or heads) when flipping a coin n times. A151975