389449642 has 32 divisors (see below), whose sum is σ = 624834000. Its totient is φ = 181698048.

The previous prime is 389449607. The next prime is 389449703. The reversal of 389449642 is 246944983.

It can be written as a sum of positive squares in 8 ways, for example, as 387656721 + 1792921 = 19689^2 + 1339^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370734 + ... + 371782.

Almost surely, 2^389449642 is an apocalyptic number.

389449642 is a deficient number, since it is larger than the sum of its proper divisors (235384358).

389449642 is a wasteful number, since it uses less digits than its factorization.

389449642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its digits is 1492992, while the sum is 49.

The square root of 389449642 is about 19734.4785084380. The cubic root of 389449642 is about 730.2705208686.

The spelling of 389449642 in words is "three hundred eighty-nine million, four hundred forty-nine thousand, six hundred forty-two".