389138942 has 8 divisors (see below), whose sum is σ = 618044256. Its totient is φ = 183124192.

The previous prime is 389138941. The next prime is 389138951. The reversal of 389138942 is 249831983.

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 (389138941) 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, 5722598 + ... + 5722665.

It is an arithmetic number, because the mean of its divisors is an integer number (77255532).

Almost surely, 2^389138942 is an apocalyptic number.

389138942 is a deficient number, since it is larger than the sum of its proper divisors (228905314).

389138942 is a wasteful number, since it uses less digits than its factorization.

389138942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445282.

The product of its digits is 373248, while the sum is 47.

The square root of 389138942 is about 19726.6049283702. The cubic root of 389138942 is about 730.0762677556.

The spelling of 389138942 in words is "three hundred eighty-nine million, one hundred thirty-eight thousand, nine hundred forty-two".