139906218 has 8 divisors (see below), whose sum is σ = 279812448. Its totient is φ = 46635404.

The previous prime is 139906201. The next prime is 139906223. The reversal of 139906218 is 812609931.

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

139906218 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11658846 + ... + 11658857.

It is an arithmetic number, because the mean of its divisors is an integer number (34976556).

Almost surely, 2^139906218 is an apocalyptic number.

139906218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139906218 is a wasteful number, since it uses less digits than its factorization.

139906218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23317708.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 139906218 is about 11828.1958894837. The cubic root of 139906218 is about 519.1334408383.

The spelling of 139906218 in words is "one hundred thirty-nine million, nine hundred six thousand, two hundred eighteen".