138409588 has 6 divisors (see below), whose sum is σ = 242216786. Its totient is φ = 69204792.

The previous prime is 138409577. The next prime is 138409589. The reversal of 138409588 is 885904831.

138409588 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 126382564 + 12027024 = 11242^2 + 3468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138409589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17301195 + ... + 17301202.

Almost surely, 2^138409588 is an apocalyptic number.

It is an amenable number.

138409588 is a deficient number, since it is larger than the sum of its proper divisors (103807198).

138409588 is a wasteful number, since it uses less digits than its factorization.

138409588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34602401 (or 34602399 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 138409588 is about 11764.7604310500. The cubic root of 138409588 is about 517.2756780184.

The spelling of 138409588 in words is "one hundred thirty-eight million, four hundred nine thousand, five hundred eighty-eight".