138588208 has 20 divisors (see below), whose sum is σ = 292925448. Its totient is φ = 62994560.

The previous prime is 138588193. The next prime is 138588211. The reversal of 138588208 is 802885831.

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, 393541 + ... + 393892.

Almost surely, 2^138588208 is an apocalyptic number.

It is an amenable number.

138588208 is an abundant number, since it is smaller than the sum of its proper divisors (154337240).

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

138588208 is a wasteful number, since it uses less digits than its factorization.

138588208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787452 (or 787446 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 138588208 is about 11772.3492982497. The cubic root of 138588208 is about 517.4981001432.

The spelling of 138588208 in words is "one hundred thirty-eight million, five hundred eighty-eight thousand, two hundred eight".