138445108 has 6 divisors (see below), whose sum is σ = 242278946. Its totient is φ = 69222552.

The previous prime is 138445067. The next prime is 138445147. The reversal of 138445108 is 801544831.

It can be written as a sum of positive squares in only one way, i.e., 113465104 + 24980004 = 10652^2 + 4998^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17305635 + ... + 17305642.

Almost surely, 2^138445108 is an apocalyptic number.

It is an amenable number.

138445108 is a deficient number, since it is larger than the sum of its proper divisors (103833838).

138445108 is a wasteful number, since it uses less digits than its factorization.

138445108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34611281 (or 34611279 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 138445108 is about 11766.2699272114. The cubic root of 138445108 is about 517.3199236540.

Adding to 138445108 its reverse (801544831), we get a palindrome (939989939).

The spelling of 138445108 in words is "one hundred thirty-eight million, four hundred forty-five thousand, one hundred eight".