685704 has 16 divisors (see below), whose sum is σ = 1714320. Its totient is φ = 228560.

The previous prime is 685697. The next prime is 685717. The reversal of 685704 is 407586.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14262 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (107145).

2⁶⁸⁵⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

685704 is an abundant number, since it is smaller than the sum of its proper divisors (1028616).

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

685704 is a wasteful number, since it uses less digits than its factorization.

685704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28580 (or 28576 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 685704 is about 828.0724605975. The cubic root of 685704 is about 88.1817867483.

The spelling of 685704 in words is "six hundred eighty-five thousand, seven hundred four".