685397204 has 12 divisors (see below), whose sum is σ = 1200093300. Its totient is φ = 342513408.

The previous prime is 685397191. The next prime is 685397231. The reversal of 685397204 is 402793586.

It can be written as a sum of positive squares in 2 ways, for example, as 486643600 + 198753604 = 22060^2 + 14098^2 .

It is a congruent 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, 37799 + ... + 52910.

It is an arithmetic number, because the mean of its divisors is an integer number (100007775).

Almost surely, 2^685397204 is an apocalyptic number.

It is an amenable number.

685397204 is a deficient number, since it is larger than the sum of its proper divisors (514696096).

685397204 is a wasteful number, since it uses less digits than its factorization.

685397204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92602 (or 92600 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 685397204 is about 26180.0917492663. The cubic root of 685397204 is about 881.6863342696.

The spelling of 685397204 in words is "six hundred eighty-five million, three hundred ninety-seven thousand, two hundred four".