138222874 has 16 divisors (see below), whose sum is σ = 216901800. Its totient is φ = 65976064.

The previous prime is 138222841. The next prime is 138222907. The reversal of 138222874 is 478222831.

It is an interprime number because it is at equal distance from previous prime (138222841) and next prime (138222907).

It can be written as a sum of positive squares in 4 ways, for example, as 74909025 + 63313849 = 8655^2 + 7957^2 .

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 7 ways as a sum of consecutive naturals, for example, 8227 + ... + 18550.

Almost surely, 2^138222874 is an apocalyptic number.

138222874 is a deficient number, since it is larger than the sum of its proper divisors (78678926).

138222874 is a wasteful number, since it uses less digits than its factorization.

138222874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26897.

The product of its digits is 43008, while the sum is 37.

The square root of 138222874 is about 11756.8224448615. The cubic root of 138222874 is about 517.0429723830.

The spelling of 138222874 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, eight hundred seventy-four".