628680920 has 32 divisors (see below), whose sum is σ = 1616608800. Its totient is φ = 215547648.

The previous prime is 628680917. The next prime is 628680947. The reversal of 628680920 is 29086826.

628680920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1122365 + ... + 1122924.

It is an arithmetic number, because the mean of its divisors is an integer number (50519025).

Almost surely, 2^628680920 is an apocalyptic number.

It is an amenable number.

628680920 is an abundant number, since it is smaller than the sum of its proper divisors (987927880).

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

628680920 is a wasteful number, since it uses less digits than its factorization.

628680920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245307 (or 2245303 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 628680920 is about 25073.5103246434. The cubic root of 628680920 is about 856.6631648751.

The spelling of 628680920 in words is "six hundred twenty-eight million, six hundred eighty thousand, nine hundred twenty".