628322664 has 16 divisors (see below), whose sum is σ = 1570806720. Its totient is φ = 209440880.

The previous prime is 628322659. The next prime is 628322687. The reversal of 628322664 is 466223826.

628322664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

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, 13090032 + ... + 13090079.

It is an arithmetic number, because the mean of its divisors is an integer number (98175420).

Almost surely, 2^628322664 is an apocalyptic number.

It is an amenable number.

628322664 is an abundant number, since it is smaller than the sum of its proper divisors (942484056).

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

628322664 is a wasteful number, since it uses less digits than its factorization.

628322664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26180120 (or 26180116 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 628322664 is about 25066.3651932226. The cubic root of 628322664 is about 856.5004097983.

The spelling of 628322664 in words is "six hundred twenty-eight million, three hundred twenty-two thousand, six hundred sixty-four".