685304 has 16 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 322432.

The previous prime is 685301. The next prime is 685319. The reversal of 685304 is 403586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2384 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2⁶⁸⁵³⁰⁴ is an apocalyptic number.

It is an amenable number.

685304 is a deficient number, since it is larger than the sum of its proper divisors (675496).

685304 is a wasteful number, since it uses less digits than its factorization.

685304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062 (or 5058 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 685304 is about 827.8309006071. The cubic root of 685304 is about 88.1646366974.

It can be divided in two parts, 685 and 304, that added together give a palindrome (989).

The spelling of 685304 in words is "six hundred eighty-five thousand, three hundred four".