388843140138 has 16 divisors (see below), whose sum is σ = 777710138400. Its totient is φ = 129610403696.

The previous prime is 388843140043. The next prime is 388843140139. The reversal of 388843140138 is 831041348883.

It is not an unprimeable number, because it can be changed into a prime (388843140139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778620 + ... + 1176407.

It is an arithmetic number, because the mean of its divisors is an integer number (48606883650).

Almost surely, 2^388843140138 is an apocalyptic number.

388843140138 is an abundant number, since it is smaller than the sum of its proper divisors (388866998262).

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

388843140138 is a wasteful number, since it uses less digits than its factorization.

388843140138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988181.

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 388843140138 in words is "three hundred eighty-eight billion, eight hundred forty-three million, one hundred forty thousand, one hundred thirty-eight".