138522736 has 30 divisors (see below), whose sum is σ = 295008896. Its totient is φ = 62964000.

The previous prime is 138522731. The next prime is 138522751. The reversal of 138522736 is 637225831.

138522736 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138522695 and 138522704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138522731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33840 + ... + 37711.

Almost surely, 2^138522736 is an apocalyptic number.

138522736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138522736 is an abundant number, since it is smaller than the sum of its proper divisors (156486160).

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

138522736 is a wasteful number, since it uses less digits than its factorization.

138522736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71581 (or 71564 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 138522736 is about 11769.5682163791. The cubic root of 138522736 is about 517.4165949584.

The spelling of 138522736 in words is "one hundred thirty-eight million, five hundred twenty-two thousand, seven hundred thirty-six".