389008428 has 24 divisors (see below), whose sum is σ = 908060160. Its totient is φ = 129616080.

The previous prime is 389008427. The next prime is 389008447. The reversal of 389008428 is 824800983.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 389008428.

It is not an unprimeable number, because it can be changed into a prime (389008421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33213 + ... + 43371.

It is an arithmetic number, because the mean of its divisors is an integer number (37835840).

Almost surely, 2^389008428 is an apocalyptic number.

It is an amenable number.

389008428 is an abundant number, since it is smaller than the sum of its proper divisors (519051732).

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

389008428 is a wasteful number, since it uses less digits than its factorization.

389008428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357 (or 13355 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 389008428 is about 19723.2965804401. The cubic root of 389008428 is about 729.9946381041.

The spelling of 389008428 in words is "three hundred eighty-nine million, eight thousand, four hundred twenty-eight".