Properties of the Number 28008

Twenty-Eight Thousand Eight

Basics

Value: 28007 → 28008 → 28009

Parity: even

Prime: No

Previous Prime: 28001

Next Prime: 28019

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 389

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110101101000

Octal: 66550

Duodecimal: 14260

Hexadecimal: 6d68

Square: 784448064

Square Root: 167.35590817177624

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

Consecutive states of the linear congruential pseudo-random number generator 172·s mod 30307 when started at s=1. A385032

Numbers k such that the powerful part of the sum of divisors of k (A387726) is greater than or equal to k, and σ(k) is not itself a powerful number. A387729

a(n) is the number of cubic polynomials with coefficients in {-n, ..., n}, positive leading coefficient, and having three rational roots. A392944

a(1) = 1+2-3 = 0, a(2) = 4+5+6-7 = 8, a(3) = 8+9+10+11-12 = 26, a(4) = 13+14+15+16+17-18 = 57, ... A111694

Number of lines through at least 2 points of a 9 X n grid of points. A160849

Expansion of e.g.f. exp(-log(1 + x)² / 2). A354317

Number of 0..n arrays x(0..8) of 9 elements with zero 6th differences. A200276

Sum of the numerators for computing the second moment of the probability mass function (PMF) of the number of 2-cycles in the involutions on n elements (A000085) assuming the involutions are all equally likely. A174764

Expansion of 1/((1-2x)(1-7x)(1-8x)(1-12x)). A28008