389128 has 16 divisors (see below), whose sum is σ = 737280. Its totient is φ = 192528.

The previous prime is 389117. The next prime is 389141. The reversal of 389128 is 821983.

389128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 389128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2³⁸⁹¹²⁸ is an apocalyptic number.

It is an amenable number.

389128 is a deficient number, since it is larger than the sum of its proper divisors (348152).

389128 is a wasteful number, since it uses less digits than its factorization.

389128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 512 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 389128 is about 623.8012503995. The cubic root of 389128 is about 73.0069424810.

The spelling of 389128 in words is "three hundred eighty-nine thousand, one hundred twenty-eight".