388889328 has 80 divisors (see below), whose sum is σ = 1021363200. Its totient is φ = 127491840.

The previous prime is 388889317. The next prime is 388889329. The reversal of 388889328 is 823988883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388889329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1250293 + ... + 1250603.

It is an arithmetic number, because the mean of its divisors is an integer number (12767040).

Almost surely, 2^388889328 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 388889328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510681600).

388889328 is an abundant number, since it is smaller than the sum of its proper divisors (632473872).

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

388889328 is a wasteful number, since it uses less digits than its factorization.

388889328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 664 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 57.

The square root of 388889328 is about 19720.2770771610. The cubic root of 388889328 is about 729.9201313758.

The spelling of 388889328 in words is "three hundred eighty-eight million, eight hundred eighty-nine thousand, three hundred twenty-eight".