389905628 has 24 divisors (see below), whose sum is σ = 780393600. Its totient is φ = 166977648.

The previous prime is 389905603. The next prime is 389905661. The reversal of 389905628 is 826509983.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 39803 + ... + 48621.

It is an arithmetic number, because the mean of its divisors is an integer number (32516400).

Almost surely, 2^389905628 is an apocalyptic number.

It is an amenable number.

389905628 is an abundant number, since it is smaller than the sum of its proper divisors (390487972).

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

389905628 is a wasteful number, since it uses less digits than its factorization.

389905628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10409 (or 10407 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 389905628 is about 19746.0281575815. The cubic root of 389905628 is about 730.5554214231. Note that the first 3 decimals are identical.

The spelling of 389905628 in words is "three hundred eighty-nine million, nine hundred five thousand, six hundred twenty-eight".