Properties of the Number 19928

Nineteen Thousand Nine Hundred Twenty-Eight

Basics

Value: 19927 → 19928 → 19929

Parity: even

Prime: No

Previous Prime: 19927

Next Prime: 19937

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 47 × 53

Divisors: 1, 2, 4, 8, 47, 53, 94, 106, 188, 212

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100110111011000

Octal: 46730

Duodecimal: B648

Hexadecimal: 4dd8

Square: 397125184

Square Root: 141.16656828017037

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

Number of partitions of n into parts not greater than sqrt(n). A97356

The minimum possible value for the apex of a triangle of numbers whose base consists of a permutation of the numbers 0 to n, and each number in a higher row is the sum of the two numbers directly below it. A189391

Number of partitions of n into 7 distinct and relatively prime parts. A339672

Row lengths of the irregular triangle defined in A090905. A90906

Number of 1-sided strip polypons with n cells. A151532

Let g be a permutation of [1..n] having say j_i cycles of length i, with Sum_i i·j_i = n; sequence gives Sum_g Sum_i (j_i)². A151882

Number of ways to put n red and n blue balls into n indistinguishable boxes. A254686

Number of partitions of n with difference -1 between the number of odd parts and the number of even parts, both counted without multiplicity. A242691

a(0) = 1; thereafter a(n) = 2*(6·n² - 3·n + 1). A386477

Number of terms in n-th row of irregular triangle defined in A093911. A93912