389015928 has 192 divisors, whose sum is σ = 1291829760. Its totient is φ = 103327488.

The previous prime is 389015927. The next prime is 389015929. The reversal of 389015928 is 829510983.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (389015927) and next prime (389015929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389015923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 428451 + ... + 429357.

It is an arithmetic number, because the mean of its divisors is an integer number (6728280).

Almost surely, 2^389015928 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 389015928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645914880).

389015928 is an abundant number, since it is smaller than the sum of its proper divisors (902813832).

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

389015928 is a wasteful number, since it uses less digits than its factorization.

389015928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 389015928 is about 19723.4867100115. The cubic root of 389015928 is about 729.9993294546. Note that the first 3 decimals are identical.

The spelling of 389015928 in words is "three hundred eighty-nine million, fifteen thousand, nine hundred twenty-eight".