Properties of the Number 56730

Fifty-Six Thousand Seven Hundred Thirty

Basics

Value: 56729 → 56730 → 56731

Parity: even

Prime: No

Previous Prime: 56713

Next Prime: 56731

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 31 × 61

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 31, 61

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1101110110011010

Octal: 156632

Duodecimal: 289B6

Hexadecimal: dd9a

Square: 3218292900

Square Root: 238.18060374430155

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

a(n) = n*(n+1)*(2·n+1). A55112

a(n) = ∑_{0 < x,y,z <= n and gcd(x² + y² + z², n)=1} gcd(x² + y² + z² - 1, n). A239612

Area of the unique primitive Pythagorean triple whose inradius is A002378(n) and such that its long leg and its hypotenuse are consecutive natural numbers. A384566

Squarefree positive integers of the form u·v*(u²-v²) for some integer u,v. A147779

Number of minimum total dominating sets in the n-Goldberg graph. A382657

a(n) = n*(n + 1)*(n² + 17·n + 54)/24. A387204

a(n) = ∑_k=0..n (-1)^k * binomial(n+k+3,n-k) * Fibonacci(k+1). A390859

Numbers that are product of a hexagonal number (A000384) and a square pyramidal numbers (A000330) in at least two ways. A306121

a(1) = 24603, a(n) = n·a(n-1) but products that are not in A010784 are first reduced as in A320486 (see comments); continue until zero is reached. A321148

Numbers k such that 423·2^k+1 is prime. A323112