Properties of the Number 55840

Fifty-Five Thousand Eight Hundred Forty

Basics

Value: 55839 → 55840 → 55841

Parity: even

Prime: No

Previous Prime: 55837

Next Prime: 55843

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ⁵ × 5 × 349

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101101000100000

Octal: 155040

Duodecimal: 28394

Hexadecimal: da20

Square: 3118105600

Square Root: 236.30488780387088

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

Place n points in general position on each side of a square, and join every pair of the 4·n+4 boundary points by a chord; sequence gives number of edges in the resulting planar graph. A367122

Bisect A053445 then calculate the first differences of the resulting sequence. A160643

Number of ways to write n as an ordered sum of eight positive Fibonacci numbers (with a single type of 1). A357716

Table read by antidiagonals: Place k points in general position on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives number of edges in the resulting planar graph. A367190

Numbers k whose decimal representation, read as a base-22 value and divided by k, yields an integer. A32575

Number of maximal matchings in the n-triangular honeycomb queen graph. A289878

Triangle T, read by rows, where column k of T = column 0 of matrix power T^k+1 for k>0, with column 0 of T = column 1 of T² (shifted). A152406

T(2n+6,n), where T is the array in A055830. A55840