138223374 has 16 divisors (see below), whose sum is σ = 277015680. Its totient is φ = 45979640.

The previous prime is 138223361. The next prime is 138223391. The reversal of 138223374 is 473322831.

138223374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138223374² = 38211402239887752, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20514 + ... + 26405.

It is an arithmetic number, because the mean of its divisors is an integer number (17313480).

Almost surely, 2^138223374 is an apocalyptic number.

138223374 is an abundant number, since it is smaller than the sum of its proper divisors (138792306).

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

138223374 is a wasteful number, since it uses less digits than its factorization.

138223374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47415.

The product of its digits is 24192, while the sum is 33.

The square root of 138223374 is about 11756.8437090913. The cubic root of 138223374 is about 517.0435958234.

The spelling of 138223374 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, three hundred seventy-four".