684604 has 12 divisors (see below), whose sum is σ = 1236928. Its totient is φ = 331200.

The previous prime is 684599. The next prime is 684617. The reversal of 684604 is 406486.

684604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2637 + ... + 2884.

2⁶⁸⁴⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

684604 is a deficient number, since it is larger than the sum of its proper divisors (552324).

684604 is a wasteful number, since it uses less digits than its factorization.

684604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556 (or 5554 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 684604 is about 827.4080009282. The cubic root of 684604 is about 88.1346080432.

The spelling of 684604 in words is "six hundred eighty-four thousand, six hundred four".