Properties of the Number 56780

Fifty-Six Thousand Seven Hundred Eighty

Basics

Value: 56779 → 56780 → 56781

Parity: even

Prime: No

Previous Prime: 56779

Next Prime: 56783

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 17 × 167

Divisors: 1, 2, 4, 5, 10, 17, 20, 34, 68, 85

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101110111001100

Octal: 156714

Duodecimal: 28A38

Hexadecimal: ddcc

Square: 3223968400

Square Root: 238.2855429941145

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

Sum of terms of n-th group in A075383. A75386

Number of partitions p of n such that (sum of parts with multiplicity 1) <= (sum of all other parts). A240449

Dirichlet convolution of A011782 [2^n-1] with A349450 [Dirichlet inverse of right-shifted Catalan numbers]. A349564

Numerators of continued fraction convergents to sqrt(426). A41810

Numerator of fraction equal to the finite continued fraction [2,7,1,8,2,...] (first n digits of e). A249944

a(n) = b(n) - c(n) where b(n) = [ (3/2)ⁿ ] and c(n) is the n-th number not in sequence b. A14250

Lexicographically first sequence of distinct terms such that any set of nine successive digits can be reordered as {d, d+1, d+2, d+3, d+4, d+5, d+6, d+7, d+8}, d being the smallest of the nine digits. A302504

Rectangular free polyominoes: number of n-celled polyominoes when the cell is a rectangle. A56780