389512428 has 12 divisors (see below), whose sum is σ = 908862360. Its totient is φ = 129837472.

The previous prime is 389512399. The next prime is 389512433. The reversal of 389512428 is 824215983.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 389512428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16229673 + ... + 16229696.

It is an arithmetic number, because the mean of its divisors is an integer number (75738530).

Almost surely, 2^389512428 is an apocalyptic number.

It is an amenable number.

389512428 is an abundant number, since it is smaller than the sum of its proper divisors (519349932).

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

389512428 is a wasteful number, since it uses less digits than its factorization.

389512428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32459376 (or 32459374 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 389512428 is about 19736.0692134984. The cubic root of 389512428 is about 730.3097628280.

The spelling of 389512428 in words is "three hundred eighty-nine million, five hundred twelve thousand, four hundred twenty-eight".