Properties of the Number 40040

Forty Thousand Forty

Basics

Value: 40039 → 40040 → 40041

Parity: even

Prime: No

Previous Prime: 40039

Next Prime: 40063

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 11 × 13

Divisors: 1, 2, 4, 5, 7, 8, 10, 11, 13, 14

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110001101000

Octal: 116150

Duodecimal: 1B208

Hexadecimal: 9c68

Square: 1603201600

Square Root: 200.0999750124922

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

Triangle read by rows, the Bell transform of the triple factorial numbers A007559(n+1) without column 0. A35469

Number T(n,k) of 2n-length strings of balanced parentheses of exactly k different types that are introduced in ascending order; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A253180

Numbers whose decimal expansion contains only 0's and 4's. A169967

Triangle T(n,k) read by rows: multiply row n of Pascal's triangle (A007318) by the n-th Catalan number (A000108). A85880

Number of tree-rooted bridgeless planar maps with two vertices and n faces. A2740

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+79)² = y². A118676

Numbers n such that the multiplicative group modulo n is the direct product of 6 cyclic groups. A272596

Triangle read by rows: T(n,k) is the number of tree-rooted planar maps with n edges, k faces and no isthmuses, n >= 0, k = 1..n+1. A342987

a(n) = 5·binomial(n, 6). A910

Largest order of a permutation of n elements with exactly 5 cycles. Also the largest LCM of a 5-partition of n. A129650