389945924 has 12 divisors (see below), whose sum is σ = 686753004. Its totient is φ = 193730784.

The previous prime is 389945921. The next prime is 389945929. The reversal of 389945924 is 429549983.

It can be written as a sum of positive squares in 2 ways, for example, as 257281600 + 132664324 = 16040^2 + 11518^2 .

It is not an unprimeable number, because it can be changed into a prime (389945921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309839 + ... + 311094.

It is an arithmetic number, because the mean of its divisors is an integer number (57229417).

Almost surely, 2^389945924 is an apocalyptic number.

It is an amenable number.

389945924 is a deficient number, since it is larger than the sum of its proper divisors (296807080).

389945924 is a wasteful number, since it uses less digits than its factorization.

389945924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621094 (or 621092 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The square root of 389945924 is about 19747.0484883185. The cubic root of 389945924 is about 730.5805877241.

The spelling of 389945924 in words is "three hundred eighty-nine million, nine hundred forty-five thousand, nine hundred twenty-four".