686180 has 24 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 249440.

The previous prime is 686177. The next prime is 686197. The reversal of 686180 is 81686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2⁶⁸⁶¹⁸⁰ is an apocalyptic number.

It is an amenable number.

686180 is an abundant number, since it is smaller than the sum of its proper divisors (886300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686180 is a wasteful number, since it uses less digits than its factorization.

686180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 686180 is about 828.3598251968. The cubic root of 686180 is about 88.2021866204.

The spelling of 686180 in words is "six hundred eighty-six thousand, one hundred eighty".