389438870 has 8 divisors (see below), whose sum is σ = 700989984. Its totient is φ = 155775544.

The previous prime is 389438843. The next prime is 389438879. The reversal of 389438870 is 78834983.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389438879) 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 3 ways as a sum of consecutive naturals, for example, 19471934 + ... + 19471953.

It is an arithmetic number, because the mean of its divisors is an integer number (87623748).

Almost surely, 2^389438870 is an apocalyptic number.

389438870 is a deficient number, since it is larger than the sum of its proper divisors (311551114).

389438870 is a wasteful number, since it uses less digits than its factorization.

389438870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38943894.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 389438870 is about 19734.2055831999. The cubic root of 389438870 is about 730.2637878230.

The spelling of 389438870 in words is "three hundred eighty-nine million, four hundred thirty-eight thousand, eight hundred seventy".