Properties of the Number 22828

Twenty-Two Thousand Eight Hundred Twenty-Eight

Basics

Value: 22827 → 22828 → 22829

Parity: even

Prime: No

Previous Prime: 22817

Next Prime: 22853

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 13 × 439

Divisors: 1, 2, 4, 13, 26, 52, 439, 878, 1756, 5707

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100100101100

Octal: 54454

Duodecimal: 11264

Hexadecimal: 592c

Square: 521117584

Square Root: 151.08937752204818

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 n such that Bernoulli number B_n has denominator 1590. A272140

a(n) = ∑_{k=0..floor((n-1)/5)} Stirling2(n,5·k+1). A365529

Numbers with digits 2 and 8 only. A284922

Number of partitions of n with up to three distinct kinds of 1. A320690

a(n) = 23 + floor( 1 + ∑_j=1..n-1 a(j)/2 ). A120147

The hyper-Wiener index of the straight pentachain of n pentagonal rings (see Fig. 2.1 in the A. A. Ali et al. reference). A224460

Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258557

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood. A271814

Composite numbers k such that φ(k) * ψ(k) + 1 is a perfect square, where φ is the Euler totient function (A000010) and ψ is the Dedekind ψ function (A001615). A309653

a(n) = absolute value of ( a([ (n+1)/2 ]) - a([ (n+1)/3 ])+...+((-1)ⁿ)a([ (n+1)/n ]) ). A22828