Properties of the Number 28224

Twenty-Eight Thousand Two Hundred Twenty-Four

Basics

Value: 28223 → 28224 → 28225

Parity: even

Prime: No

Previous Prime: 28219

Next Prime: 28229

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁶ × 3 ² × 7 ²

Divisors: 1, 2, 3, 4, 6, 7, 8, 9, 12, 14

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001000000

Octal: 67100

Duodecimal: 14400

Hexadecimal: 6e40

Square: 796594176

Square Root: 168

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

Triangle of Lah numbers. A8297

Triangle read by rows: T(n,k) = binomial(n,k)*(n-1)!/(k-1)!. A105278

Fourier coefficients of E_infinity,4. A7331

The matrix inverse of the unsigned Lah numbers A271703. A111596

Triangle read by rows: the unsigned Lah numbers T(n, k) = binomial(n-1, k-1)*n!/k! if n > 0 and k > 0, T(n, 0) = 0ⁿ and otherwise 0, for n >= 0 and 0 <= k <= n. A271703

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of nⁿ as Sum(k=0..n)T(n,k)*binomial(n,k). A244120

a(n) = (4·n)². A16802

Coefficient triangle of generalized Laguerre polynomials (a=1). A66667

Coefficient of xⁿ in ∏_k>=1 ((1 + x^k) / (1 - x^k))ⁿ. A270919

Denominator of 1/64 - 1/n². A61050