389089728 has 84 divisors (see below), whose sum is σ = 1118862888. Its totient is φ = 129277440.

The previous prime is 389089721. The next prime is 389089747. The reversal of 389089728 is 827980983.

It is a super-2 number, since 2×389089728² = 302781632870227968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389089721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 213943 + ... + 215753.

Almost surely, 2^389089728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389089728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559431444).

389089728 is an abundant number, since it is smaller than the sum of its proper divisors (729773160).

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

389089728 is a wasteful number, since it uses less digits than its factorization.

389089728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 389089728 is about 19725.3574872548. The cubic root of 389089728 is about 730.0454891276.

The spelling of 389089728 in words is "three hundred eighty-nine million, eighty-nine thousand, seven hundred twenty-eight".