686080 has 48 divisors (see below), whose sum is σ = 1670760. Its totient is φ = 270336.

The previous prime is 686057. The next prime is 686087. The reversal of 686080 is 80686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207 + ... + 10273.

2⁶⁸⁶⁰⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835380).

686080 is an abundant number, since it is smaller than the sum of its proper divisors (984680).

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

686080 is an equidigital number, since it uses as much as digits as its factorization.

686080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 686080 is about 828.2994627549. The cubic root of 686080 is about 88.1979017160.

The spelling of 686080 in words is "six hundred eighty-six thousand, eighty".