Properties of the Number 28556

Twenty-Eight Thousand Five Hundred Fifty-Six

Basics

Value: 28555 → 28556 → 28557

Parity: even

Prime: No

Previous Prime: 28549

Next Prime: 28559

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 11 ² × 59

Divisors: 1, 2, 4, 11, 22, 44, 59, 118, 121, 236

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 110111110001100

Octal: 67614

Duodecimal: 14638

Hexadecimal: 6f8c

Square: 815445136

Square Root: 168.98520645310938

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

G.f.: exp( ∑_n>=1 4^A001511(n) * xⁿ/n ), where 2^A001511(n) is the highest power of 2 that divides 2·n. A217553

Number of new duplicate terms at a given iteration of the Collatz (or 3x+1) map starting with 0. A275545

Irregular triangle read by rows: T(n,k) is the number of chordless cycles of length k in the n-diagonal intersection graph, 4 <= k <= kmax. A371340

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A306055

Palindromes of form k*(k+4). A28556

Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 3 neighboring 1s. A296401