138272836 has 12 divisors (see below), whose sum is σ = 260591212. Its totient is φ = 63818208.

The previous prime is 138272809. The next prime is 138272837. The reversal of 138272836 is 638272831.

138272836 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 82919236 + 55353600 = 9106^2 + 7440^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138272837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329495 + ... + 1329598.

Almost surely, 2^138272836 is an apocalyptic number.

It is an amenable number.

138272836 is a deficient number, since it is larger than the sum of its proper divisors (122318376).

138272836 is a wasteful number, since it uses less digits than its factorization.

138272836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659110 (or 2659108 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 138272836 is about 11758.9470617058. The cubic root of 138272836 is about 517.1052616129.

The spelling of 138272836 in words is "one hundred thirty-eight million, two hundred seventy-two thousand, eight hundred thirty-six".