Properties of the Number 22428

Twenty-Two Thousand Four Hundred Twenty-Eight

Basics

Value: 22427 → 22428 → 22429

Parity: even

Prime: No

Previous Prime: 22409

Next Prime: 22433

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 7 × 89

Divisors: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101011110011100

Octal: 53634

Duodecimal: 10B90

Hexadecimal: 579c

Square: 503015184

Square Root: 149.7598076921842

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

28-gonal numbers: a(n) = n*(13·n - 12). A161935

Numbers n such that there exists an x≠n that makes {n,n,x} an amicable multiset. A259302

Expansion of ∏_k>=1 1/(1 - (3·k-2)*x^3·k-2). A265821

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k increasing cycles (0<=k<=n). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... . A186754

Numbers that belong to at least one amicable multiset. A259307

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero. A230926

Triangle T(n,k) defined by ∑_k=1..n T(n,k)*u^k*xⁿ/n! = ∏_j>0 (1-x^j)^-u/j. A338805

Numbers k that have at least two different representations as the product of a number and of its decimal digits. A336944

Integers k such that there exists an integer 0<m<k such that σ(k) = σ(m) = m + 2·k. A383239

Triangle T, read by rows : T(n,k) = A007318(n,k)*A005773(n+1-k). A171651