389550728 has 16 divisors (see below), whose sum is σ = 834751680. Its totient is φ = 166950288.

The previous prime is 389550709. The next prime is 389550731. The reversal of 389550728 is 827055983.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478076 + ... + 3478187.

It is an arithmetic number, because the mean of its divisors is an integer number (52171980).

Almost surely, 2^389550728 is an apocalyptic number.

It is an amenable number.

389550728 is an abundant number, since it is smaller than the sum of its proper divisors (445200952).

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

389550728 is a wasteful number, since it uses less digits than its factorization.

389550728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956276 (or 6956272 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 389550728 is about 19737.0394943112. The cubic root of 389550728 is about 730.3336986901. Note that the first 3 decimals are identical.

The spelling of 389550728 in words is "three hundred eighty-nine million, five hundred fifty thousand, seven hundred twenty-eight".