Properties of the Number 28105

Twenty-Eight Thousand One Hundred Five

Basics

Value: 28104 → 28105 → 28106

Parity: odd

Prime: No

Previous Prime: 28099

Next Prime: 28109

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 11 × 73

Divisors: 1, 5, 7, 11, 35, 55, 73, 77, 365, 385

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111001001

Octal: 66711

Duodecimal: 14321

Hexadecimal: 6dc9

Square: 789891025

Square Root: 167.64545922869488

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

Expansion of (∏_j>=1 (1-(-x)^j) - 1)¹¹ in powers of x. A47649

Number of simple labeled graphs on n+2 nodes with exactly n connected components that are trees or cycles. A215862

Numbers k such that k and k+1 are the product of exactly four distinct primes. A318896

Triangle read by rows, defined by Riordan's general Eulerian recursion: T(n, k) = (k+3)*T(n-1, k) + (n-k-2) * T(n-1, k-1) with T(n,1) = 1, T(n,n) = (-2)^n-1. A306547

Expansion of 1/((1-3x)(1-9x)(1-10x)(1-11x)). A28105

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A317568