Properties of the Number 28126

Twenty-Eight Thousand One Hundred Twenty-Six

Basics

Value: 28125 → 28126 → 28127

Parity: even

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 ³ × 41

Divisors: 1, 2, 7, 14, 41, 49, 82, 98, 287, 343

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111011110

Octal: 66736

Duodecimal: 1433A

Hexadecimal: 6dde

Square: 791071876

Square Root: 167.70807970995315

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(2·n+2) = 8·a(2·n+1), a(2·n+1) = 8·a(2·n) - 7ⁿ*A000108(n), a(0)=1. A156362

Numbers k such that φ(k)*σ(k) is a cube. A114077

a(n) = 9·5ⁿ+1. A199313

a(n) = the smallest k such that Fibonacci(k) begins and ends with n, where Fibonacci(k) > n, or -1 if there are none. A374026

Numbers whose sum of prime divisors equals the sum of square divisors. A390397

Numbers k such that (266·10^k - 11) / 3 is prime. A277066

a(n) = binomial(n+6,6)*(2n+7)/7. A50486

Expansion of 1/((1-4x)(1-5x)(1-9x)(1-12x)). A28126