678685204 has 12 divisors (see below), whose sum is σ = 1195565728. Its totient is φ = 337095000.

The previous prime is 678685199. The next prime is 678685229. The reversal of 678685204 is 402586876.

It is a super-2 number, since 2×678685204² = 921227212257043232, which contains 22 as substring.

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, 561222 + ... + 562429.

Almost surely, 2^678685204 is an apocalyptic number.

It is an amenable number.

678685204 is a deficient number, since it is larger than the sum of its proper divisors (516880524).

678685204 is a wasteful number, since it uses less digits than its factorization.

678685204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123806 (or 1123804 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 678685204 is about 26051.5873604662. The cubic root of 678685204 is about 878.7988105169.

The spelling of 678685204 in words is "six hundred seventy-eight million, six hundred eighty-five thousand, two hundred four".