138584658 has 16 divisors (see below), whose sum is σ = 277411680. Its totient is φ = 46154496.

The previous prime is 138584653. The next prime is 138584701. The reversal of 138584658 is 856485831.

138584658 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138584653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188 + ... + 16791.

It is an arithmetic number, because the mean of its divisors is an integer number (17338230).

Almost surely, 2^138584658 is an apocalyptic number.

138584658 is an abundant number, since it is smaller than the sum of its proper divisors (138827022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138584658 is a wasteful number, since it uses less digits than its factorization.

138584658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201.

The product of its digits is 921600, while the sum is 48.

The square root of 138584658 is about 11772.1985202425. The cubic root of 138584658 is about 517.4936814557.

The spelling of 138584658 in words is "one hundred thirty-eight million, five hundred eighty-four thousand, six hundred fifty-eight".