138447934740 has 72 divisors (see below), whose sum is σ = 422740002048. Its totient is φ = 36674942400.

The previous prime is 138447934661. The next prime is 138447934769. The reversal of 138447934740 is 47439744831.

It is a happy number.

138447934740 is a `hidden beast` number, since 1 + 3 + 84 + 4 + 7 + 93 + 474 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2519692 + ... + 2574051.

Almost surely, 2^138447934740 is an apocalyptic number.

138447934740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138447934740 is an abundant number, since it is smaller than the sum of its proper divisors (284292067308).

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

138447934740 is a wasteful number, since it uses less digits than its factorization.

138447934740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093909 (or 5093904 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 138447934740 in words is "one hundred thirty-eight billion, four hundred forty-seven million, nine hundred thirty-four thousand, seven hundred forty".