Properties of the Number 28231

Twenty-Eight Thousand Two Hundred Thirty-One

Basics

Value: 28230 → 28231 → 28232

Parity: odd

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 7 × 37 × 109

Divisors: 1, 7, 37, 109, 259, 763, 4033, 28231

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001000111

Octal: 67107

Duodecimal: 14407

Hexadecimal: 6e47

Square: 796989361

Square Root: 168.02083204174417

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) = 49·n² + 7. A158481

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 48. A31726

Start of the first run of exactly n consecutive odd composite numbers. A75067

Structured octagonal anti-prism numbers. A100184

7 times octagonal numbers: a(n) = 7·n*(3·n-2). A153797

(r,1)-greedy sequence, where r(k) = k/log(k+1). A270749

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1111-0100 pattern in any orientation. A146837

Number of n X n binary arrays with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation. A147035

Length of longest chain of nonempty proper inverse subsemigroups of the dual symmetric inverse monoid. A262296

L.g.f.: log(∑_k>=0 k! * x^{k*(k + 1}/2) / ∏_j=1..k (1 - x^j)). A331337