628601980 has 24 divisors (see below), whose sum is σ = 1323618912. Its totient is φ = 250763712.

The previous prime is 628601971. The next prime is 628602031. The reversal of 628601980 is 89106826.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34672 + ... + 49591.

It is an arithmetic number, because the mean of its divisors is an integer number (55150788).

Almost surely, 2^628601980 is an apocalyptic number.

It is an amenable number.

628601980 is an abundant number, since it is smaller than the sum of its proper divisors (695016932).

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

628601980 is a wasteful number, since it uses less digits than its factorization.

628601980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84645 (or 84643 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 628601980 is about 25071.9361039390. The cubic root of 628601980 is about 856.6273078827.

The spelling of 628601980 in words is "six hundred twenty-eight million, six hundred one thousand, nine hundred eighty".