685504 has 14 divisors (see below), whose sum is σ = 1360424. Its totient is φ = 342720.

The previous prime is 685493. The next prime is 685511. The reversal of 685504 is 405586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5292 + ... + 5419.

2⁶⁸⁵⁵⁰⁴ is an apocalyptic number.

685504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

685504 is a deficient number, since it is larger than the sum of its proper divisors (674920).

685504 is a wasteful number, since it uses less digits than its factorization.

685504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723 (or 10713 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 685504 is about 827.9516894119. The cubic root of 685504 is about 88.1732125568.

The spelling of 685504 in words is "six hundred eighty-five thousand, five hundred four".