389932872 has 64 divisors (see below), whose sum is σ = 1135140480. Its totient is φ = 109304832.

The previous prime is 389932871. The next prime is 389932883. The reversal of 389932872 is 278239983.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (389932871) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12993 + ... + 30800.

It is an arithmetic number, because the mean of its divisors is an integer number (17736570).

Almost surely, 2^389932872 is an apocalyptic number.

It is an amenable number.

389932872 is an abundant number, since it is smaller than the sum of its proper divisors (745207608).

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

389932872 is a wasteful number, since it uses less digits than its factorization.

389932872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43862 (or 43858 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 389932872 is about 19746.7180057852. The cubic root of 389932872 is about 730.5724364706.

The spelling of 389932872 in words is "three hundred eighty-nine million, nine hundred thirty-two thousand, eight hundred seventy-two".