138386056 has 16 divisors (see below), whose sum is σ = 260554140. Its totient is φ = 68904960.

The previous prime is 138386051. The next prime is 138386081. The reversal of 138386056 is 650683831.

It can be written as a sum of positive squares in 2 ways, for example, as 131469156 + 6916900 = 11466^2 + 2630^2 .

It is not an unprimeable number, because it can be changed into a prime (138386051) by changing a digit.

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, 33961 + ... + 37816.

Almost surely, 2^138386056 is an apocalyptic number.

It is an amenable number.

138386056 is a deficient number, since it is larger than the sum of its proper divisors (122168084).

138386056 is a wasteful number, since it uses less digits than its factorization.

138386056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72024 (or 72020 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 138386056 is about 11763.7602831748. The cubic root of 138386056 is about 517.2463611160.

The spelling of 138386056 in words is "one hundred thirty-eight million, three hundred eighty-six thousand, fifty-six".