Properties of the Number 28138

Twenty-Eight Thousand One Hundred Thirty-Eight

Basics

Value: 28137 → 28138 → 28139

Parity: even

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 11 × 1279

Divisors: 1, 2, 11, 22, 1279, 2558, 14069, 28138

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111101010

Octal: 66752

Duodecimal: 1434A

Hexadecimal: 6dea

Square: 791747044

Square Root: 167.74385234636767

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

Number of achiral rooted trees. A3241

a(n) is the number of compositions of n, b₁ + ... + b_t = n such that sqrt(b₁ + sqrt(b₂ + ... + sqrt(b_t)...)) is an integer. A338271

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 517", based on the 5-celled von Neumann neighborhood. A272732

a(n) = ∑_k=0..n binomial(4·n,k). A66381

Number of (n+1)X(5+1) arrays of permutations of 0..n·6+5 with each element having directed index change 0,0 0,1 1,0 or -1,-2. A264282

Expansion of 1/((1-4x)(1-6x)(1-8x)(1-12x)). A28138