Properties of the Number 28005

Twenty-Eight Thousand Five

Basics

Value: 28004 → 28005 → 28006

Parity: odd

Prime: No

Previous Prime: 28001

Next Prime: 28019

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 1867

Divisors: 1, 3, 5, 15, 1867, 5601, 9335, 28005

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110101100101

Octal: 66545

Duodecimal: 14259

Hexadecimal: 6d65

Square: 784280025

Square Root: 167.3469449975111

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 k such that (prime(j)-1)² + 1 is prime for k <= j <= k + 2. A376522

Array of higher spin alternating sign matrices, read by antidiagonals. A143670

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}. A148632

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}. A149654

Number of minima of the 1-D Griewank function in [-n, n]. A178832

Expansion of 1/((1-2x)(1-7x)(1-8x)(1-9x)). A28005