389128850 has 48 divisors (see below), whose sum is σ = 797359680. Its totient is φ = 140107200.

The previous prime is 389128849. The next prime is 389128879. The reversal of 389128850 is 58821983.

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 23 ways as a sum of consecutive naturals, for example, 53216 + ... + 60084.

It is an arithmetic number, because the mean of its divisors is an integer number (16611660).

Almost surely, 2^389128850 is an apocalyptic number.

389128850 is an abundant number, since it is smaller than the sum of its proper divisors (408230830).

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

389128850 is a wasteful number, since it uses less digits than its factorization.

389128850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 389128850 is about 19726.3491300342. The cubic root of 389128850 is about 730.0699563908.

The spelling of 389128850 in words is "three hundred eighty-nine million, one hundred twenty-eight thousand, eight hundred fifty".