388595664 has 80 divisors (see below), whose sum is σ = 1151434240. Its totient is φ = 125349120.

The previous prime is 388595617. The next prime is 388595693. The reversal of 388595664 is 466595883.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 388595664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117 + ... + 27900.

It is an arithmetic number, because the mean of its divisors is an integer number (14392928).

Almost surely, 2^388595664 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 388595664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575717120).

388595664 is an abundant number, since it is smaller than the sum of its proper divisors (762838576).

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

388595664 is a wasteful number, since it uses less digits than its factorization.

388595664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29065 (or 29053 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 388595664 is about 19712.8299338274. The cubic root of 388595664 is about 729.7363556609.

The spelling of 388595664 in words is "three hundred eighty-eight million, five hundred ninety-five thousand, six hundred sixty-four".