Properties of the Number 40638

Forty Thousand Six Hundred Thirty-Eight

Basics

Value: 40637 → 40638 → 40639

Parity: even

Prime: No

Previous Prime: 40637

Next Prime: 40639

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 13 × 521

Divisors: 1, 2, 3, 6, 13, 26, 39, 78, 521, 1042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001111010111110

Octal: 117276

Duodecimal: 1B626

Hexadecimal: 9ebe

Square: 1651447044

Square Root: 201.58869015894717

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 regions formed when every pair of vertices of a regular n-gon are joined by an infinite line. A345025

Number of independent subsets of nodes in graph formed from n-fold subdivision of triangle. A27740

a(1)=1. a(n) = a(n-1) + (product of the earlier terms {among terms a(1) through a(n-1)} which are coprime to n). A127077

Number of nXnXn triangular 0..2 arrays with no element equal to the product mod 3 of any two neighbors. A193367

Number of distinct products of distinct factorials up to n!. A255937

a(n) = A027082(n, 2n-4). A27091

Continued fraction for sqrt(664). A40638