Properties of the Number 28500

Twenty-Eight Thousand Five Hundred

Basics

Value: 28499 → 28500 → 28501

Parity: even

Prime: No

Previous Prime: 28499

Next Prime: 28513

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 ³ × 19

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 19

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110111101010100

Octal: 67524

Duodecimal: 145B0

Hexadecimal: 6f54

Square: 812250000

Square Root: 168.81943016134133

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

T(n,k)=Number of length n+5 0..k arrays with no six consecutive terms having five times any element equal to the sum of the remaining five. A249530

Numbers n such that sopf(σ(n)) = σ(sopf(n)), where sopf(x) = sum of the distinct prime factors of x. A76532

E.g.f. satisfies: A(x) = ∑_n>=0 log(1 + x·A(x)ⁿ)ⁿ/n!. A189981

Dirichlet g.f.: ∏_k>=2 1 / (1 - k^-s)^k³. A343283

Number of circular compositions of n such that no two adjacent parts are equal. A106369

Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 3. A202843

Number of secondary structures of size n having no stacks of length 3. A202844

Integers that can be expressed as the sum of consecutive primes in exactly 5 ways. A55000

Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=n-w+|y-z|. A212684

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 318", based on the 5-celled von Neumann neighborhood. A281100