628666108 has 12 divisors (see below), whose sum is σ = 1257332272. Its totient is φ = 269428320.

The previous prime is 628666097. The next prime is 628666123. The reversal of 628666108 is 801666826.

628666108 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11226153 + ... + 11226208.

Almost surely, 2^628666108 is an apocalyptic number.

It is an amenable number.

628666108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

628666108 is a wasteful number, since it uses less digits than its factorization.

628666108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22452372 (or 22452370 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 628666108 is about 25073.2149514178. The cubic root of 628666108 is about 856.6564370348.

The spelling of 628666108 in words is "six hundred twenty-eight million, six hundred sixty-six thousand, one hundred eight".