138608186 has 8 divisors (see below), whose sum is σ = 210544320. Its totient is φ = 68426748.

The previous prime is 138608177. The next prime is 138608201. The reversal of 138608186 is 681806831.

138608186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 438476 + ... + 438791.

It is an arithmetic number, because the mean of its divisors is an integer number (26318040).

Almost surely, 2^138608186 is an apocalyptic number.

138608186 is a deficient number, since it is larger than the sum of its proper divisors (71936134).

138608186 is an equidigital number, since it uses as much as digits as its factorization.

138608186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877348.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 138608186 is about 11773.1977814016. The cubic root of 138608186 is about 517.5229653667.

The spelling of 138608186 in words is "one hundred thirty-eight million, six hundred eight thousand, one hundred eighty-six".