Properties of the Number 56818

Fifty-Six Thousand Eight Hundred Eighteen

Basics

Value: 56817 → 56818 → 56819

Parity: even

Prime: No

Previous Prime: 56813

Next Prime: 56821

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 28409

Divisors: 1, 2, 28409, 56818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101110111110010

Octal: 156762

Duodecimal: 28A6A

Hexadecimal: ddf2

Square: 3228285124

Square Root: 238.36526592605728

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

a(n) = ∑_i=1..n σ(i)*σ(i+1), where σ(n) = A000203(n) is the sum of the divisors of n. A330322

G.f.: ∑_n>=0 (1 + (1+x)ⁿ⁺¹)ⁿ * xⁿ. A326276

Number of 4 X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. A266937

G.f. A(x) satisfies: ∑_n>=0 A(x)⁽ⁿ⁺¹²) * xⁿ = ∑_n>=0 ((1+x)ⁿ⁺¹ + 1)ⁿ * xⁿ. A326557

A number n is included if n² divides n-th term of A056855. A56818