Properties of the Number -679680

Six Hundred Seventy-Nine Thousand Six Hundred Eighty

Basics

Value: -679681 → -679680 → -679679

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 2 ⁸ × 3 ² × 5 × 59

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -10100101111100000000

Octal: -2457400

Duodecimal: -289400

Hexadecimal: -a5f00

Square: 461964902400

Square Root: 824.4270737912481

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

Expansion of log(1+x)/cosh(log(1+x)). A9430

Number of subsets of {1..n} containing the product of any set of distinct elements whose product is <= n. A326081

Numbers m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,67. A65701

A variant of payphone permutations: given a row of n payphones, a(n) is the number ways for n people to choose the payphones in order, where each person chooses an unoccupied payphone such that the closest occupied payphone is as distant as possible, and a payphone adjacent to a single occupied payphone is preferred over a payphone sandwiched between two occupied payphones. A363785

Triangle T(n,m) = coefficient of xⁿ in expansion of [x*(x+1)^x+1]^m = sum(n>=m, T(n,m) xⁿ*m!/n!). A202190