Properties of the Number 28856

Twenty-Eight Thousand Eight Hundred Fifty-Six

Basics

Value: 28855 → 28856 → 28857

Parity: even

Prime: No

Previous Prime: 28843

Next Prime: 28859

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 3607

Divisors: 1, 2, 4, 8, 3607, 7214, 14428, 28856

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000010111000

Octal: 70270

Duodecimal: 14848

Hexadecimal: 70b8

Square: 832668736

Square Root: 169.8705389406886

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

Number of partitions p of n such that m(p) <= m(c(p)), where m = maximal multiplicity of parts, and c = conjugate. A240727

First differences of (provable) Sierpiński numbers (A076336). A270971

Fibonacci sequence beginning 2, 28. A22376

Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 22 (most significant digit on right). A29515

n·10³-1, n·10³-3, n·10³-7 and n·10³-9 are all prime. A64977

Numbers n such that the average of the positive divisors of n is a Fibonacci number. A272440

Number of (n+2) X 5 0..3 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order. A204637

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order. A204642

Number of prime unlabeled T₀ topologies (i.e., prime T₀ homeomorphism classes) on n points. A28856