138321748 has 12 divisors (see below), whose sum is σ = 254803360. Its totient is φ = 65520792.

The previous prime is 138321739. The next prime is 138321751. The reversal of 138321748 is 847123831.

138321748 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909936 + ... + 910087.

Almost surely, 2^138321748 is an apocalyptic number.

It is an amenable number.

138321748 is a deficient number, since it is larger than the sum of its proper divisors (116481612).

138321748 is a wasteful number, since it uses less digits than its factorization.

138321748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820046 (or 1820044 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 138321748 is about 11761.0266558664. The cubic root of 138321748 is about 517.1662272409.

The spelling of 138321748 in words is "one hundred thirty-eight million, three hundred twenty-one thousand, seven hundred forty-eight".