389390428 has 24 divisors (see below), whose sum is σ = 779500512. Its totient is φ = 166727424.

The previous prime is 389390387. The next prime is 389390459. The reversal of 389390428 is 824093983.

It is a congruent number.

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, 27576 + ... + 39232.

It is an arithmetic number, because the mean of its divisors is an integer number (32479188).

Almost surely, 2^389390428 is an apocalyptic number.

It is an amenable number.

389390428 is an abundant number, since it is smaller than the sum of its proper divisors (390110084).

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

389390428 is a wasteful number, since it uses less digits than its factorization.

389390428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861 (or 12859 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 389390428 is about 19732.9781837410. The cubic root of 389390428 is about 730.2335075848.

The spelling of 389390428 in words is "three hundred eighty-nine million, three hundred ninety thousand, four hundred twenty-eight".