Properties of the Number 80940

Eighty Thousand Nine Hundred Forty

Basics

Value: 80939 → 80940 → 80941

Parity: even

Prime: No

Previous Prime: 80933

Next Prime: 80953

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 19 × 71

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 19

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110000101100

Octal: 236054

Duodecimal: 3AA10

Hexadecimal: 13c2c

Square: 6551283600

Square Root: 284.49956063234964

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 in a regular drawing of the complete bipartite graph K_n,n. A290131

Numbers n such that σ(n) = 12*φ(n). A104902

Number of ways to place 2 nonattacking amazons (superqueens) on an n X n board. A172200

Number of sequences of length n over {1, -1} with Erdős discrepancy <= 2. A181740

Where A098018(k)=-n. A98874

Ulam numbers that are oblong (or promic) numbers. A379828

a(n) =(A001359[n]²-1)/2. A117849

Numbers k whose 10's complement mod 10 of their digits is equal to φ(k), the Euler totient function of k. A300487

Smallest proper divisor of n which is a suffix of n in binary representation; a(n) = 0 if no such divisor exists. A80940