Properties of the Number 18878

Eighteen Thousand Eight Hundred Seventy-Eight

Basics

Value: 18877 → 18878 → 18879

Parity: even

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 9439

Divisors: 1, 2, 9439, 18878

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110111110

Octal: 44676

Duodecimal: AB12

Hexadecimal: 49be

Square: 356378884

Square Root: 137.39723432442153

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 different absolute values of vector sums generated by n vectors chosen from 2n (equally spaced) points around the unit circle. Dipole moments of n positive and n negative equally spaced charges on a circle. A77078

a(n) = ∑_{k=0..floor(n/4)} binomial(n-1-3·k,n-4·k) * binomial(2·k,k). A360310

Number of polyominoes of order 2n that can be tiled by dominoes in a unique way. A213377

G.f.: (1 - x/(1 - x²/(1 - x³/(1 - x⁴/(1 - ...))))) / (1 + x/(1 + x²/(1 + x³/(1 + x⁴/(1 + ...))))), a continued fraction. A285635

a(n)⁸ is smallest eighth power beginning with n. A18878