138028430868 has 24 divisors (see below), whose sum is σ = 332455576320. Its totient is φ = 44525300160.

The previous prime is 138028430863. The next prime is 138028430873. The reversal of 138028430868 is 868034820831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138028430863) and next prime (138028430873).

It is a self number, because there is not a number n which added to its sum of digits gives 138028430868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138028430861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185521713 + ... + 185522456.

It is an arithmetic number, because the mean of its divisors is an integer number (13852315680).

Almost surely, 2^138028430868 is an apocalyptic number.

It is an amenable number.

138028430868 is an abundant number, since it is smaller than the sum of its proper divisors (194427145452).

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

138028430868 is a wasteful number, since it uses less digits than its factorization.

138028430868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371044207 (or 371044205 counting only the distinct ones).

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

The spelling of 138028430868 in words is "one hundred thirty-eight billion, twenty-eight million, four hundred thirty thousand, eight hundred sixty-eight".