389644128 has 192 divisors, whose sum is σ = 1184440320. Its totient is φ = 124540416.

The previous prime is 389644111. The next prime is 389644169. The reversal of 389644128 is 821446983.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3068001 + ... + 3068127.

It is an arithmetic number, because the mean of its divisors is an integer number (6168960).

Almost surely, 2^389644128 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 389644128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592220160).

389644128 is an abundant number, since it is smaller than the sum of its proper divisors (794796192).

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

389644128 is a wasteful number, since it uses less digits than its factorization.

389644128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 252 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 389644128 is about 19739.4054621713. The cubic root of 389644128 is about 730.3920631183.

The spelling of 389644128 in words is "three hundred eighty-nine million, six hundred forty-four thousand, one hundred twenty-eight".