138399274 has 16 divisors (see below), whose sum is σ = 223827912. Its totient is φ = 63802368.

The previous prime is 138399269. The next prime is 138399293. The reversal of 138399274 is 472993831.

It can be written as a sum of positive squares in 4 ways, for example, as 131675625 + 6723649 = 11475^2 + 2593^2 .

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, 24282 + ... + 29434.

Almost surely, 2^138399274 is an apocalyptic number.

138399274 is a deficient number, since it is larger than the sum of its proper divisors (85428638).

138399274 is a wasteful number, since it uses less digits than its factorization.

138399274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201.

The product of its digits is 326592, while the sum is 46.

The square root of 138399274 is about 11764.3220799160. The cubic root of 138399274 is about 517.2628289233.

The spelling of 138399274 in words is "one hundred thirty-eight million, three hundred ninety-nine thousand, two hundred seventy-four".