388556928 has 96 divisors (see below), whose sum is σ = 1122591600. Its totient is φ = 129000960.

The previous prime is 388556921. The next prime is 388556933. The reversal of 388556928 is 829655883.

388556928 is a `hidden beast` number, since 3 + 88 + 556 + 9 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (388556921) 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 11 ways as a sum of consecutive naturals, for example, 380803 + ... + 381821.

Almost surely, 2^388556928 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 388556928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561295800).

388556928 is an abundant number, since it is smaller than the sum of its proper divisors (734034672).

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

388556928 is a wasteful number, since it uses less digits than its factorization.

388556928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1355 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 388556928 is about 19711.8474020067. The cubic root of 388556928 is about 729.7121076576.

The spelling of 388556928 in words is "three hundred eighty-eight million, five hundred fifty-six thousand, nine hundred twenty-eight".