628832780 has 12 divisors (see below), whose sum is σ = 1320548880. Its totient is φ = 251533104.

The previous prime is 628832777. The next prime is 628832801. The reversal of 628832780 is 87238826.

628832780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 15720800 + ... + 15720839.

It is an arithmetic number, because the mean of its divisors is an integer number (110045740).

Almost surely, 2^628832780 is an apocalyptic number.

It is an amenable number.

628832780 is an abundant number, since it is smaller than the sum of its proper divisors (691716100).

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

628832780 is a wasteful number, since it uses less digits than its factorization.

628832780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31441648 (or 31441646 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 628832780 is about 25076.5384373522. The cubic root of 628832780 is about 856.7321359491.

The spelling of 628832780 in words is "six hundred twenty-eight million, eight hundred thirty-two thousand, seven hundred eighty".