628904 has 16 divisors (see below), whose sum is σ = 1190400. Its totient is φ = 311472.

The previous prime is 628877. The next prime is 628909. The reversal of 628904 is 409826.

It is not an unprimeable number, because it can be changed into a prime (628909) by changing a digit.

628904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (74400).

2⁶²⁸⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

628904 is a deficient number, since it is larger than the sum of its proper divisors (561496).

628904 is a wasteful number, since it uses less digits than its factorization.

628904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 628904 is about 793.0346776781. The cubic root of 628904 is about 85.6764478495.

The spelling of 628904 in words is "six hundred twenty-eight thousand, nine hundred four".