Properties of the Number 28558

Twenty-Eight Thousand Five Hundred Fifty-Eight

Basics

Value: 28557 → 28558 → 28559

Parity: even

Prime: No

Previous Prime: 28549

Next Prime: 28559

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 109 × 131

Divisors: 1, 2, 109, 131, 218, 262, 14279, 28558

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110111110001110

Octal: 67616

Duodecimal: 1463A

Hexadecimal: 6f8e

Square: 815559364

Square Root: 168.99112402726956

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) = 1 + 2·n + 3·n² + 4·n³. A56578

a(1)=1, a(n) = n·19^n-1 + a(n-1). A14936

Number of nondecreasing arrangements of n numbers in -5..5 with sum zero and sum of squares not greater than n·30/3. A183923

Number of 6 X n 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. A223953

Expansion of g.f. (1 - x·C(x)) * (1 - x·C(x²)) / (1 - 4·x), where C(x) = 1 + x·C(x)² is the Catalan function (A000108). A370539

G.f. = g(f(x)), where f(x) = g.f. of Fibonacci sequence A000045 and g(x) = g.f. of Jacobsthal sequence A001045. A322573

T(n,k)=Number of nXk 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. A223949

Expansion of g.f. A(x) satisfying A(x)² = A(x²) * (1 - x·C(x)) * (1 - x·C(x²)) / (1 - 4·x) where C(x) = 1 + x·C(x)² is the Catalan function (A000108). A370540

Numbers k such that k*(k+5) is a palindrome. A28558