Properties of the Number 28145

Twenty-Eight Thousand One Hundred Forty-Five

Basics

Value: 28144 → 28145 → 28146

Parity: odd

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 13 × 433

Divisors: 1, 5, 13, 65, 433, 2165, 5629, 28145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111110001

Octal: 66761

Duodecimal: 14355

Hexadecimal: 6df1

Square: 792141025

Square Root: 167.7647161950331

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

Pseudo-random numbers: MS C 6.0 version. A84275

a(n) = [xⁿ] (x - 1)⁴/((1 - 2·x)*(x² - 3·x + 1)). A341104

Expansion of 1/((1-4x)(1-7x)(1-8x)(1-9x)). A28145

Number of 4-element intersecting families (with not necessarily distinct sets) whose union is an n-element set. A52390

Number of (n+1)X(2+1) 0..2 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock. A236059

Number of 3 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4. A240002