388866688 has 64 divisors (see below), whose sum is σ = 892393920. Its totient is φ = 165335040.

The previous prime is 388866679. The next prime is 388866719. The reversal of 388866688 is 886668883.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115720 + ... + 119032.

It is an arithmetic number, because the mean of its divisors is an integer number (13943655).

Almost surely, 2^388866688 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 388866688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446196960).

388866688 is an abundant number, since it is smaller than the sum of its proper divisors (503527232).

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

388866688 is a wasteful number, since it uses less digits than its factorization.

388866688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465 (or 3453 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 61.

The square root of 388866688 is about 19719.7030403604. The cubic root of 388866688 is about 729.9059664954.

The spelling of 388866688 in words is "three hundred eighty-eight million, eight hundred sixty-six thousand, six hundred eighty-eight".