388685503668 has 192 divisors, whose sum is σ = 1201158604800. Its totient is φ = 94765800960.

The previous prime is 388685503663. The next prime is 388685503727. The reversal of 388685503668 is 866305586883.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 388685503599 and 388685503608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388685503663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1812046 + ... + 2015162.

It is an arithmetic number, because the mean of its divisors is an integer number (6256034400).

Almost surely, 2^388685503668 is an apocalyptic number.

388685503668 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388685503668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600579302400).

388685503668 is an abundant number, since it is smaller than the sum of its proper divisors (812473101132).

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

388685503668 is a wasteful number, since it uses less digits than its factorization.

388685503668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203270 (or 203268 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 66.

The spelling of 388685503668 in words is "three hundred eighty-eight billion, six hundred eighty-five million, five hundred three thousand, six hundred sixty-eight".