138442206 has 32 divisors (see below), whose sum is σ = 316793088. Its totient is φ = 39510720.

The previous prime is 138442163. The next prime is 138442217. The reversal of 138442206 is 602244831.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 63226 + ... + 65378.

It is an arithmetic number, because the mean of its divisors is an integer number (9899784).

Almost surely, 2^138442206 is an apocalyptic number.

138442206 is an abundant number, since it is smaller than the sum of its proper divisors (178350882).

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

138442206 is a wasteful number, since it uses less digits than its factorization.

138442206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 138442206 is about 11766.1466079596. The cubic root of 138442206 is about 517.3163090495.

The spelling of 138442206 in words is "one hundred thirty-eight million, four hundred forty-two thousand, two hundred six".