388172328 has 128 divisors (see below), whose sum is σ = 1050624000. Its totient is φ = 119266560.

The previous prime is 388172321. The next prime is 388172329. The reversal of 388172328 is 823271883.

It is a self number, because there is not a number n which added to its sum of digits gives 388172328.

It is not an unprimeable number, because it can be changed into a prime (388172321) 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 31 ways as a sum of consecutive naturals, for example, 1624033 + ... + 1624271.

It is an arithmetic number, because the mean of its divisors is an integer number (8208000).

Almost surely, 2^388172328 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 388172328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525312000).

388172328 is an abundant number, since it is smaller than the sum of its proper divisors (662451672).

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

388172328 is a wasteful number, since it uses less digits than its factorization.

388172328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 371 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 388172328 is about 19702.0894323419. The cubic root of 388172328 is about 729.4712678529.

The spelling of 388172328 in words is "three hundred eighty-eight million, one hundred seventy-two thousand, three hundred twenty-eight".