628404 has 24 divisors (see below), whose sum is σ = 1675968. Its totient is φ = 179520.

The previous prime is 628399. The next prime is 628423. The reversal of 628404 is 404826.

628404 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 7 ways as a sum of consecutive naturals, for example, 3657 + ... + 3824.

It is an arithmetic number, because the mean of its divisors is an integer number (69832).

2⁶²⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

628404 is an abundant number, since it is smaller than the sum of its proper divisors (1047564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628404 is a wasteful number, since it uses less digits than its factorization.

628404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495 (or 7493 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 628404 is about 792.7193702692. The cubic root of 628404 is about 85.6537366029.

The spelling of 628404 in words is "six hundred twenty-eight thousand, four hundred four".