389136812 has 24 divisors (see below), whose sum is σ = 705236112. Its totient is φ = 187761600.

The previous prime is 389136773. The next prime is 389136821. The reversal of 389136812 is 218631983.

It is a self number, because there is not a number n which added to its sum of digits gives 389136812.

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, 2114 + ... + 27977.

It is an arithmetic number, because the mean of its divisors is an integer number (29384838).

Almost surely, 2^389136812 is an apocalyptic number.

It is an amenable number.

389136812 is a deficient number, since it is larger than the sum of its proper divisors (316099300).

389136812 is a wasteful number, since it uses less digits than its factorization.

389136812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30209 (or 30207 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 389136812 is about 19726.5509402936. The cubic root of 389136812 is about 730.0749356990.

The spelling of 389136812 in words is "three hundred eighty-nine million, one hundred thirty-six thousand, eight hundred twelve".