388641888 has 60 divisors (see below), whose sum is σ = 1142992620. Its totient is φ = 129546432.

The previous prime is 388641887. The next prime is 388641937. The reversal of 388641888 is 888146883.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388641887) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 72378 + ... + 77561.

It is an arithmetic number, because the mean of its divisors is an integer number (19049877).

Almost surely, 2^388641888 is an apocalyptic number.

It is an amenable number.

388641888 is an abundant number, since it is smaller than the sum of its proper divisors (754350732).

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

388641888 is a wasteful number, since it uses less digits than its factorization.

388641888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149961 (or 149944 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 54.

The square root of 388641888 is about 19714.0023333670. The cubic root of 388641888 is about 729.7652889018.

The spelling of 388641888 in words is "three hundred eighty-eight million, six hundred forty-one thousand, eight hundred eighty-eight".