628883668 has 12 divisors (see below), whose sum is σ = 1257767392. Its totient is φ = 269521560.

The previous prime is 628883663. The next prime is 628883683. The reversal of 628883668 is 866388826.

628883668 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628883663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11230038 + ... + 11230093.

Almost surely, 2^628883668 is an apocalyptic number.

It is an amenable number.

628883668 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.

628883668 is a wasteful number, since it uses less digits than its factorization.

628883668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22460142 (or 22460140 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The square root of 628883668 is about 25077.5530704254. The cubic root of 628883668 is about 856.7552455422.

The spelling of 628883668 in words is "six hundred twenty-eight million, eight hundred eighty-three thousand, six hundred sixty-eight".