628640576 has 14 divisors (see below), whose sum is σ = 1247458770. Its totient is φ = 314320256.

The previous prime is 628640561. The next prime is 628640587. The reversal of 628640576 is 675046826.

It can be written as a sum of positive squares in only one way, i.e., 623800576 + 4840000 = 24976^2 + 2200^2 .

It is a super-2 number, since 2×628640576² = 790377947587223552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4911191 + ... + 4911318.

Almost surely, 2^628640576 is an apocalyptic number.

It is an amenable number.

628640576 is a deficient number, since it is larger than the sum of its proper divisors (618818194).

628640576 is an equidigital number, since it uses as much as digits as its factorization.

628640576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822521 (or 9822511 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 628640576 is about 25072.7057973407. The cubic root of 628640576 is about 856.6448397560.

The spelling of 628640576 in words is "six hundred twenty-eight million, six hundred forty thousand, five hundred seventy-six".