389931670 has 8 divisors (see below), whose sum is σ = 701877024. Its totient is φ = 155972664.

The previous prime is 389931643. The next prime is 389931683. The reversal of 389931670 is 76139983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 389931670.

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 3 ways as a sum of consecutive naturals, for example, 19496574 + ... + 19496593.

It is an arithmetic number, because the mean of its divisors is an integer number (87734628).

Almost surely, 2^389931670 is an apocalyptic number.

389931670 is a deficient number, since it is larger than the sum of its proper divisors (311945354).

389931670 is a wasteful number, since it uses less digits than its factorization.

389931670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38993174.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 389931670 is about 19746.6875703243. The cubic root of 389931670 is about 730.5716857867.

The spelling of 389931670 in words is "three hundred eighty-nine million, nine hundred thirty-one thousand, six hundred seventy".