389612328 has 256 divisors, whose sum is σ = 1244160000. Its totient is φ = 101267712.

The previous prime is 389612297. The next prime is 389612339. The reversal of 389612328 is 823216983.

It is a super-2 number, since 2×389612328² = 303595532259159168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 389612328.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7351150 + ... + 7351202.

It is an arithmetic number, because the mean of its divisors is an integer number (4860000).

Almost surely, 2^389612328 is an apocalyptic number.

389612328 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389612328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622080000).

389612328 is an abundant number, since it is smaller than the sum of its proper divisors (854547672).

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

389612328 is a wasteful number, since it uses less digits than its factorization.

389612328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 131 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 389612328 is about 19738.5999503511. The cubic root of 389612328 is about 730.3721927649.

The spelling of 389612328 in words is "three hundred eighty-nine million, six hundred twelve thousand, three hundred twenty-eight".