138331474 has 8 divisors (see below), whose sum is σ = 208021068. Its totient is φ = 68991120.

The previous prime is 138331447. The next prime is 138331511. The reversal of 138331474 is 474133831.

It can be written as a sum of positive squares in 2 ways, for example, as 130530625 + 7800849 = 11425^2 + 2793^2 .

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

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, 86317 + ... + 87904.

Almost surely, 2^138331474 is an apocalyptic number.

138331474 is a deficient number, since it is larger than the sum of its proper divisors (69689594).

138331474 is a wasteful number, since it uses less digits than its factorization.

138331474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174620.

The product of its digits is 24192, while the sum is 34.

The square root of 138331474 is about 11761.4401329089. The cubic root of 138331474 is about 517.1783483544.

The spelling of 138331474 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, four hundred seventy-four".