Properties of the Number 40840

Forty Thousand Eight Hundred Forty

Basics

Value: 40839 → 40840 → 40841

Parity: even

Prime: No

Previous Prime: 40829

Next Prime: 40841

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 1021

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 1021, 2042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111110001000

Octal: 117610

Duodecimal: 1B774

Hexadecimal: 9f88

Square: 1667905600

Square Root: 202.08908926510605

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 self-inverse permutations p on [n] with displacement of elements restricted by 6: |p(i)-i| <= 6. A239078

Number of 4 X n 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing. A224160

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, 0)}. A150582

Number of nonnegative solutions to x² + y² + z² < n². A218711

Continued fraction for sqrt(870). A40840

Number of (n+1)X(n+1) -11..11 symmetric matrices with every 2X2 subblock having sum zero and one, two or three distinct values. A211714