138838631060 has 96 divisors (see below), whose sum is σ = 307105344000. Its totient is φ = 52622507520.

The previous prime is 138838631059. The next prime is 138838631123. The reversal of 138838631060 is 60136838831.

It is a happy number.

It is a super-2 number, since 2×138838631060² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138838630996 and 138838631014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22393841 + ... + 22400039.

It is an arithmetic number, because the mean of its divisors is an integer number (3199014000).

Almost surely, 2^138838631060 is an apocalyptic number.

138838631060 is a gapful number since it is divisible by the number (10) 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 138838631060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153552672000).

138838631060 is an abundant number, since it is smaller than the sum of its proper divisors (168266712940).

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

138838631060 is a wasteful number, since it uses less digits than its factorization.

138838631060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681 (or 6679 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 138838631060 in words is "one hundred thirty-eight billion, eight hundred thirty-eight million, six hundred thirty-one thousand, sixty".