138916324 has 12 divisors (see below), whose sum is σ = 245255724. Its totient is φ = 68843264.

The previous prime is 138916279. The next prime is 138916369. The reversal of 138916324 is 423619831.

It is an interprime number because it is at equal distance from previous prime (138916279) and next prime (138916369).

It can be written as a sum of positive squares in 2 ways, for example, as 34222500 + 104693824 = 5850^2 + 10232^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153217 + ... + 154120.

It is an arithmetic number, because the mean of its divisors is an integer number (20437977).

Almost surely, 2^138916324 is an apocalyptic number.

It is an amenable number.

138916324 is a deficient number, since it is larger than the sum of its proper divisors (106339400).

138916324 is a wasteful number, since it uses less digits than its factorization.

138916324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307454 (or 307452 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 138916324 is about 11786.2769354873. The cubic root of 138916324 is about 517.9061809883.

The spelling of 138916324 in words is "one hundred thirty-eight million, nine hundred sixteen thousand, three hundred twenty-four".