Properties of the Number 28108

Twenty-Eight Thousand One Hundred Eight

Basics

Value: 28107 → 28108 → 28109

Parity: even

Prime: No

Previous Prime: 28099

Next Prime: 28109

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 7027

Divisors: 1, 2, 4, 7027, 14054, 28108

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111001100

Octal: 66714

Duodecimal: 14324

Hexadecimal: 6dcc

Square: 790059664

Square Root: 167.65440644373174

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

Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded. A85844

Number of length 4+3 0..n arrays with some disjoint pairs in every consecutive four terms having the same sum. A247536

T(n,k)=Number of length n+3 0..k arrays with some disjoint pairs in every consecutive four terms having the same sum. A247533

Triangle read by rows giving the coefficients of general sum formulas of n-th Fibonacci numbers (A000045). The k-th row (k>=1) contains T(i,k) for i=1 to 2·k-1, where T(i,k) satisfies F(n) = ∑_k=1..n ∑_i=1..2·k-1 T(i,k) * C(n-k,i-1) * n^n-k / (n-1)!. A100492

Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors. A208405

Expansion of 1/((1-3x)(1-10x)(1-11x)(1-12x)). A28108