389121968 has 20 divisors (see below), whose sum is σ = 757836168. Its totient is φ = 193551360.

The previous prime is 389121917. The next prime is 389121991. The reversal of 389121968 is 869121983.

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, 59918 + ... + 66093.

Almost surely, 2^389121968 is an apocalyptic number.

It is an amenable number.

389121968 is a deficient number, since it is larger than the sum of its proper divisors (368714200).

389121968 is a wasteful number, since it uses less digits than its factorization.

389121968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126212 (or 126206 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 389121968 is about 19726.1746925247. The cubic root of 389121968 is about 730.0656524428.

The spelling of 389121968 in words is "three hundred eighty-nine million, one hundred twenty-one thousand, nine hundred sixty-eight".