685164 has 12 divisors (see below), whose sum is σ = 1598744. Its totient is φ = 228384.

The previous prime is 685141. The next prime is 685169. The reversal of 685164 is 461586.

685164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685169) 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, 28537 + ... + 28560.

2⁶⁸⁵¹⁶⁴ is an apocalyptic number.

It is an amenable number.

685164 is an abundant number, since it is smaller than the sum of its proper divisors (913580).

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

685164 is a wasteful number, since it uses less digits than its factorization.

685164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57104 (or 57102 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 685164 is about 827.7463379563. The cubic root of 685164 is about 88.1586326030.

The spelling of 685164 in words is "six hundred eighty-five thousand, one hundred sixty-four".