389158686 has 144 divisors (see below), whose sum is σ = 1039154688. Its totient is φ = 104781600.

The previous prime is 389158669. The next prime is 389158691. The reversal of 389158686 is 686851983.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1175541 + ... + 1175871.

It is an arithmetic number, because the mean of its divisors is an integer number (7216352).

Almost surely, 2^389158686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389158686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519577344).

389158686 is an abundant number, since it is smaller than the sum of its proper divisors (649996002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389158686 is a wasteful number, since it uses less digits than its factorization.

389158686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 417 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 389158686 is about 19727.1053629264. The cubic root of 389158686 is about 730.0886150010.

The spelling of 389158686 in words is "three hundred eighty-nine million, one hundred fifty-eight thousand, six hundred eighty-six".