628904512 has 14 divisors (see below), whose sum is σ = 1247982518. Its totient is φ = 314452224.

The previous prime is 628904501. The next prime is 628904537. The reversal of 628904512 is 215409826.

It can be written as a sum of positive squares in only one way, i.e., 429981696 + 198922816 = 20736^2 + 14104^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4913253 + ... + 4913380.

Almost surely, 2^628904512 is an apocalyptic number.

It is an amenable number.

628904512 is a deficient number, since it is larger than the sum of its proper divisors (619078006).

628904512 is an equidigital number, since it uses as much as digits as its factorization.

628904512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9826645 (or 9826635 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 628904512 is about 25077.9686577681. The cubic root of 628904512 is about 856.7647109965.

The spelling of 628904512 in words is "six hundred twenty-eight million, nine hundred four thousand, five hundred twelve".