138840284132 has 12 divisors (see below), whose sum is σ = 265058724336. Its totient is φ = 63109220040.

The previous prime is 138840284117. The next prime is 138840284137. The reversal of 138840284132 is 231482048831.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 3155461003 = 138840284132 / (1 + 3 + 8 + 8 + 4 + 0 + 2 + 8 + 4 + 1 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (138840284137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577730458 + ... + 1577730545.

It is an arithmetic number, because the mean of its divisors is an integer number (22088227028).

Almost surely, 2^138840284132 is an apocalyptic number.

It is an amenable number.

138840284132 is a deficient number, since it is larger than the sum of its proper divisors (126218440204).

138840284132 is a wasteful number, since it uses less digits than its factorization.

138840284132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155461018 (or 3155461016 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 138840284132 in words is "one hundred thirty-eight billion, eight hundred forty million, two hundred eighty-four thousand, one hundred thirty-two".