389443994 has 12 divisors (see below), whose sum is σ = 598766622. Its totient is φ = 189971040.

The previous prime is 389443993. The next prime is 389444023. The reversal of 389443994 is 499344983.

It can be written as a sum of positive squares in 3 ways, for example, as 107640625 + 281803369 = 10375^2 + 16787^2 .

It is not an unprimeable number, because it can be changed into a prime (389443993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54557 + ... + 61280.

Almost surely, 2^389443994 is an apocalyptic number.

389443994 is a deficient number, since it is larger than the sum of its proper divisors (209322628).

389443994 is a wasteful number, since it uses less digits than its factorization.

389443994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115921 (or 115880 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The square root of 389443994 is about 19734.3354081155. The cubic root of 389443994 is about 730.2669905980.

The spelling of 389443994 in words is "three hundred eighty-nine million, four hundred forty-three thousand, nine hundred ninety-four".