389693138 has 8 divisors (see below), whose sum is σ = 586408188. Its totient is φ = 194223744.

The previous prime is 389693137. The next prime is 389693189. The reversal of 389693138 is 831396983.

It can be written as a sum of positive squares in 2 ways, for example, as 308458969 + 81234169 = 17563^2 + 9013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (389693131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310631 + ... + 311882.

Almost surely, 2^389693138 is an apocalyptic number.

389693138 is a deficient number, since it is larger than the sum of its proper divisors (196715050).

389693138 is a wasteful number, since it uses less digits than its factorization.

389693138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622828.

The product of its digits is 839808, while the sum is 50.

The square root of 389693138 is about 19740.6468485711. The cubic root of 389693138 is about 730.4226850899.

The spelling of 389693138 in words is "three hundred eighty-nine million, six hundred ninety-three thousand, one hundred thirty-eight".