388246664 has 64 divisors (see below), whose sum is σ = 819126000. Its totient is φ = 171279360.

The previous prime is 388246619. The next prime is 388246667. The reversal of 388246664 is 466642883.

It can be written as a sum of positive squares in 8 ways, for example, as 256960900 + 131285764 = 16030^2 + 11458^2 .

It is not an unprimeable number, because it can be changed into a prime (388246667) 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 15 ways as a sum of consecutive naturals, for example, 328154 + ... + 329334.

Almost surely, 2^388246664 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 388246664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409563000).

388246664 is an abundant number, since it is smaller than the sum of its proper divisors (430879336).

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

388246664 is a wasteful number, since it uses less digits than its factorization.

388246664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1334 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 47.

The square root of 388246664 is about 19703.9758424537. The cubic root of 388246664 is about 729.5178300893.

The spelling of 388246664 in words is "three hundred eighty-eight million, two hundred forty-six thousand, six hundred sixty-four".