628804 has 24 divisors (see below), whose sum is σ = 1241856. Its totient is φ = 276000.

The previous prime is 628801. The next prime is 628811. The reversal of 628804 is 408826.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (628801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (51744).

2⁶²⁸⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

628804 is a deficient number, since it is larger than the sum of its proper divisors (613052).

628804 is a wasteful number, since it uses less digits than its factorization.

628804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 628804 is about 792.9716262263. The cubic root of 628804 is about 85.6719065634.

The spelling of 628804 in words is "six hundred twenty-eight thousand, eight hundred four".