138303302840 has 128 divisors (see below), whose sum is σ = 338537802240. Its totient is φ = 50709474816.

The previous prime is 138303302701. The next prime is 138303302873. The reversal of 138303302840 is 48203303831.

It is a self number, because there is not a number n which added to its sum of digits gives 138303302840.

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, 2063699 + ... + 2129661.

It is an arithmetic number, because the mean of its divisors is an integer number (2644826580).

Almost surely, 2^138303302840 is an apocalyptic number.

138303302840 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 138303302840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169268901120).

138303302840 is an abundant number, since it is smaller than the sum of its proper divisors (200234499400).

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

138303302840 is a wasteful number, since it uses less digits than its factorization.

138303302840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66093 (or 66089 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

Subtracting from 138303302840 its reverse (48203303831), we obtain a palindrome (90099999009).

The spelling of 138303302840 in words is "one hundred thirty-eight billion, three hundred three million, three hundred two thousand, eight hundred forty".