138322266 has 8 divisors (see below), whose sum is σ = 276644544. Its totient is φ = 46107420.

The previous prime is 138322241. The next prime is 138322273. The reversal of 138322266 is 662223831.

It is a happy number.

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

138322266 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, 11526850 + ... + 11526861.

It is an arithmetic number, because the mean of its divisors is an integer number (34580568).

Almost surely, 2^138322266 is an apocalyptic number.

138322266 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.

138322266 is a wasteful number, since it uses less digits than its factorization.

138322266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23053716.

The product of its digits is 20736, while the sum is 33.

The square root of 138322266 is about 11761.0486777328. The cubic root of 138322266 is about 517.1668728173.

The spelling of 138322266 in words is "one hundred thirty-eight million, three hundred twenty-two thousand, two hundred sixty-six".