389109028 has 24 divisors (see below), whose sum is σ = 848965824. Its totient is φ = 151600800.

The previous prime is 389109011. The next prime is 389109043. The reversal of 389109028 is 820901983.

It is a super-2 number, since 2×389109028² = 302811671342209568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631363 + ... + 631978.

It is an arithmetic number, because the mean of its divisors is an integer number (35373576).

Almost surely, 2^389109028 is an apocalyptic number.

It is an amenable number.

389109028 is an abundant number, since it is smaller than the sum of its proper divisors (459856796).

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

389109028 is a wasteful number, since it uses less digits than its factorization.

389109028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263363 (or 1263361 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 389109028 is about 19725.8466991914. The cubic root of 389109028 is about 730.0575597323.

The spelling of 389109028 in words is "three hundred eighty-nine million, one hundred nine thousand, twenty-eight".