138888304854740 has 96 divisors (see below), whose sum is σ = 344188469151744. Its totient is φ = 46068841082880.

The previous prime is 138888304854619. The next prime is 138888304854779. The reversal of 138888304854740 is 47458403888831.

It is a super-2 number, since 2×138888304854740² (a number of 29 digits) contains 22 as substring.

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, 9548672 + ... + 19208168.

It is an arithmetic number, because the mean of its divisors is an integer number (3585296553664).

Almost surely, 2^{138888304854740} is an apocalyptic number.

138888304854740 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 138888304854740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172094234575872).

138888304854740 is an abundant number, since it is smaller than the sum of its proper divisors (205300164297004).

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

138888304854740 is a wasteful number, since it uses less digits than its factorization.

138888304854740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9662857 (or 9662855 counting only the distinct ones).

The product of its (nonzero) digits is 660602880, while the sum is 71.

The spelling of 138888304854740 in words is "one hundred thirty-eight trillion, eight hundred eighty-eight billion, three hundred four million, eight hundred fifty-four thousand, seven hundred forty".