389409904 has 40 divisors (see below), whose sum is σ = 834495200. Its totient is φ = 174866688.

The previous prime is 389409901. The next prime is 389409919. The reversal of 389409904 is 409904983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389409901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17604 + ... + 32995.

It is an arithmetic number, because the mean of its divisors is an integer number (20862380).

Almost surely, 2^389409904 is an apocalyptic number.

It is an amenable number.

389409904 is an abundant number, since it is smaller than the sum of its proper divisors (445085296).

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

389409904 is a wasteful number, since it uses less digits than its factorization.

389409904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50657 (or 50651 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 389409904 is about 19733.4716661818. The cubic root of 389409904 is about 730.2456819901.

The spelling of 389409904 in words is "three hundred eighty-nine million, four hundred nine thousand, nine hundred four".