389786638 has 16 divisors (see below), whose sum is σ = 601468560. Its totient is φ = 189314496.

The previous prime is 389786623. The next prime is 389786647. The reversal of 389786638 is 836687983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44770 + ... + 52762.

It is an arithmetic number, because the mean of its divisors is an integer number (37591785).

Almost surely, 2^389786638 is an apocalyptic number.

389786638 is a deficient number, since it is larger than the sum of its proper divisors (211681922).

389786638 is a wasteful number, since it uses less digits than its factorization.

389786638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8691.

The product of its digits is 10450944, while the sum is 58.

The square root of 389786638 is about 19743.0149166737. The cubic root of 389786638 is about 730.4810977682.

The spelling of 389786638 in words is "three hundred eighty-nine million, seven hundred eighty-six thousand, six hundred thirty-eight".