138679588 has 12 divisors (see below), whose sum is σ = 247268700. Its totient is φ = 68031392.

The previous prime is 138679579. The next prime is 138679621. The reversal of 138679588 is 885976831.

It can be written as a sum of positive squares in 2 ways, for example, as 37234404 + 101445184 = 6102^2 + 10072^2 .

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, 326863 + ... + 327286.

It is an arithmetic number, because the mean of its divisors is an integer number (20605725).

Almost surely, 2^138679588 is an apocalyptic number.

It is an amenable number.

138679588 is a deficient number, since it is larger than the sum of its proper divisors (108589112).

138679588 is a wasteful number, since it uses less digits than its factorization.

138679588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654206 (or 654204 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The square root of 138679588 is about 11776.2297871602. The cubic root of 138679588 is about 517.6118149326.

The spelling of 138679588 in words is "one hundred thirty-eight million, six hundred seventy-nine thousand, five hundred eighty-eight".