Properties of the Number 28724

Twenty-Eight Thousand Seven Hundred Twenty-Four

Basics

Value: 28723 → 28724 → 28725

Parity: even

Prime: No

Previous Prime: 28723

Next Prime: 28729

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 43 × 167

Divisors: 1, 2, 4, 43, 86, 167, 172, 334, 668, 7181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000000110100

Octal: 70064

Duodecimal: 14758

Hexadecimal: 7034

Square: 825068176

Square Root: 169.4815624190431

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

T(n,k) = Number of (n+1)X(k+1) 0..3 arrays with every 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward and upward neighbors. A205642

Positions of check bits in code in A075937. A75939

Grundy function for turn-at-most-6-coins game. A54043

Positive integers whose square is the sum of 96 consecutive squares. A257827

Denominators of continued fraction convergents to sqrt(543). A42039

Numbers k such that there is a primitive Pythagorean triple with perimeter k and inradius r such that p + r, p - r, p + r² and |p - r²| are all prime. A392988

a(n) = prime(n)*prime(n+1) - prime(n). A37166

Number of (n+1)X3 0..3 arrays with every 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward and upward neighbors. A205636

Number of (5+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically. A253702

Number of partitions of n into parts not of the form 23k, 23k+10 or 23k-10. Also number of partitions with at most 9 parts of size 1 and differences between parts at distance 10 are greater than 1. A35998