628938168 has 32 divisors (see below), whose sum is σ = 1623068160. Its totient is φ = 202883040.

The previous prime is 628938139. The next prime is 628938187. The reversal of 628938168 is 861839826.

It is a self number, because there is not a number n which added to its sum of digits gives 628938168.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421930 + ... + 423417.

It is an arithmetic number, because the mean of its divisors is an integer number (50720880).

Almost surely, 2^628938168 is an apocalyptic number.

It is an amenable number.

628938168 is an abundant number, since it is smaller than the sum of its proper divisors (994129992).

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

628938168 is a wasteful number, since it uses less digits than its factorization.

628938168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845387 (or 845383 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 628938168 is about 25078.6396760271. The cubic root of 628938168 is about 856.7799940579.

The spelling of 628938168 in words is "six hundred twenty-eight million, nine hundred thirty-eight thousand, one hundred sixty-eight".