685384 has 16 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 293712.

The previous prime is 685381. The next prime is 685393. The reversal of 685384 is 483586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685381) 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, 6064 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2⁶⁸⁵³⁸⁴ is an apocalyptic number.

It is an amenable number.

685384 is an abundant number, since it is smaller than the sum of its proper divisors (783416).

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

685384 is a wasteful number, since it uses less digits than its factorization.

685384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12252 (or 12248 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 685384 is about 827.8792182438. The cubic root of 685384 is about 88.1680672413.

The spelling of 685384 in words is "six hundred eighty-five thousand, three hundred eighty-four".