Properties of the Number 28127

Twenty-Eight Thousand One Hundred Twenty-Seven

Basics

Value: 28126 → 28127 → 28128

Parity: odd

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 × 2557

Divisors: 1, 11, 2557, 28127

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111011111

Octal: 66737

Duodecimal: 1433B

Hexadecimal: 6ddf

Square: 791128129

Square Root: 167.7110610544218

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

Sum of the numbers already killed in the first jump of a Sieve of Eratosthenes table. A179628

Number of 2 X 2 matrices having all terms in {1,...,n} and determinant >= 2n. A211062

a(n) = γ(n+1, φ)*exp(φ) + γ(n+1, 1-φ)*exp(1-φ), where φ=(1+sqrt(5))/2. A277345

Numbers k such that k and k² use only the digits 1, 2, 7, 8 and 9. A137018

Number of n X 3 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down. A253218

Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero. A304928

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 5 or 7 king-move adjacent elements, with upper left element zero. A304931

Expansion of 1/((1-4x)(1-5x)(1-10x)(1-11x)). A28127