138398068840 has 64 divisors (see below), whose sum is σ = 314355888000. Its totient is φ = 54834796800.

The previous prime is 138398068799. The next prime is 138398068847. The reversal of 138398068840 is 48860893831.

It is not an unprimeable number, because it can be changed into a prime (138398068847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412490 + ... + 2469190.

It is an arithmetic number, because the mean of its divisors is an integer number (4911810750).

Almost surely, 2^138398068840 is an apocalyptic number.

138398068840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138398068840 is an abundant number, since it is smaller than the sum of its proper divisors (175957819160).

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

138398068840 is a wasteful number, since it uses less digits than its factorization.

138398068840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57290 (or 57286 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 138398068840 in words is "one hundred thirty-eight billion, three hundred ninety-eight million, sixty-eight thousand, eight hundred forty".