Properties of the Number 28186

Twenty-Eight Thousand One Hundred Eighty-Six

Basics

Value: 28185 → 28186 → 28187

Parity: even

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 17 × 829

Divisors: 1, 2, 17, 34, 829, 1658, 14093, 28186

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111000011010

Octal: 67032

Duodecimal: 1438A

Hexadecimal: 6e1a

Square: 794450596

Square Root: 167.88686666919483

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) = ∑_j=1..n ∑_k=1..n φ(j·k) / φ(k). A372636

Number of partitions p of 2n such that n - (number of parts of p) is a part of p. A238607

Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 3 (mod 4). A35551

Number of (n+2)X5 binary arrays avoiding patterns 001 and 100 in rows and columns. A202312

Expansion of 1/((1-5x)(1-7x)(1-9x)(1-12x)). A28186

a(n) is the maximal size of a set of lines in the complex n-dimensional space Cⁿ with the property that all the subtriples of lines are pairwise congruent. A146890