Properties of the Number 28567

Twenty-Eight Thousand Five Hundred Sixty-Seven

Basics

Value: 28566 → 28567 → 28568

Parity: odd

Prime: No

Previous Prime: 28559

Next Prime: 28571

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 ² × 11 × 53

Divisors: 1, 7, 11, 49, 53, 77, 371, 539, 583, 2597

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111110010111

Octal: 67627

Duodecimal: 14647

Hexadecimal: 6f97

Square: 816073489

Square Root: 169.0177505470949

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

Wolstenholme numbers: numerator of ∑_k=1..n 1/k³. A7408

a(n) = ∑_k=1..n floor(n/k)³. A318742

a(n) = number of steps required to reach 0 from F(n+2)-1 by repeatedly subtracting from a natural number the number of ones in its Zeckendorf representation. Here F(n) = the n-th Fibonacci number, F(0) = 0, F(1) = 1, F(2) = 1, F(3) = 2, ... A261081

Integers which can be written in exactly three ways as sum of two distinct nonzero pentagonal numbers. A333013

Array T(n,k) read by ascending antidiagonals, where T(n,k) is the numerator of polygamma(n, 1) - polygamma(n, k). A255008

A self-"read and extend" sequence built following the rules visible in the Comments section (a kind of Collatz-by-digits sequence). A316764

a(n) = 54·n² + 1. A158646

Coefficient of the irreducible character of S_m indexed by (m-2n+2,2n-2) in the n-th Kronecker power of the representation indexed by (m-2,2). A90809

Numbers which are numerators of at least one reduced rational sum{k=1 to m} 1/kⁿ, taken over all positive integers m and n. A94509

Partial sums of A147562. A272928