138320274 has 16 divisors (see below), whose sum is σ = 276894720. Its totient is φ = 46064400.

The previous prime is 138320267. The next prime is 138320309. The reversal of 138320274 is 472023831.

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, 3109 + ... + 16920.

It is an arithmetic number, because the mean of its divisors is an integer number (17305920).

Almost surely, 2^138320274 is an apocalyptic number.

138320274 is an abundant number, since it is smaller than the sum of its proper divisors (138574446).

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

138320274 is a wasteful number, since it uses less digits than its factorization.

138320274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21185.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 138320274 is about 11760.9639911021. The cubic root of 138320274 is about 517.1643902058.

The spelling of 138320274 in words is "one hundred thirty-eight million, three hundred twenty thousand, two hundred seventy-four".