388640080668 has 192 divisors, whose sum is σ = 1115044761600. Its totient is φ = 102991150080.

The previous prime is 388640080627. The next prime is 388640080727. The reversal of 388640080668 is 866080046883.

It is a super-2 number, since 2×388640080668² (a number of 24 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 7093138 + ... + 7147718.

It is an arithmetic number, because the mean of its divisors is an integer number (5807524800).

Almost surely, 2^388640080668 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 388640080668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557522380800).

388640080668 is an abundant number, since it is smaller than the sum of its proper divisors (726404680932).

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

388640080668 is a wasteful number, since it uses less digits than its factorization.

388640080668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54740 (or 54738 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 57.

The spelling of 388640080668 in words is "three hundred eighty-eight billion, six hundred forty million, eighty thousand, six hundred sixty-eight".