138228082 has 4 divisors (see below), whose sum is σ = 207342126. Its totient is φ = 69114040.

The previous prime is 138228067. The next prime is 138228089. The reversal of 138228082 is 280822831.

138228082 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123010281 + 15217801 = 11091^2 + 3901^2 .

It is not an unprimeable number, because it can be changed into a prime (138228089) by changing a digit.

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 as a sum of consecutive naturals, namely, 34557019 + ... + 34557022.

Almost surely, 2^138228082 is an apocalyptic number.

138228082 is a deficient number, since it is larger than the sum of its proper divisors (69114044).

138228082 is an equidigital number, since it uses as much as digits as its factorization.

138228082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69114043.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 138228082 is about 11757.0439311929. The cubic root of 138228082 is about 517.0494660645.

It can be divided in two parts, 13822 and 8082, that added together give a square (21904 = 148²).

The spelling of 138228082 in words is "one hundred thirty-eight million, two hundred twenty-eight thousand, eighty-two".