138479212 has 12 divisors (see below), whose sum is σ = 256593960. Its totient is φ = 65166656.

The previous prime is 138479207. The next prime is 138479227. The reversal of 138479212 is 212974831.

138479212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138479212² = 38352984312281888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018162 + ... + 1018297.

It is an arithmetic number, because the mean of its divisors is an integer number (21382830).

Almost surely, 2^138479212 is an apocalyptic number.

It is an amenable number.

138479212 is a deficient number, since it is larger than the sum of its proper divisors (118114748).

138479212 is a wasteful number, since it uses less digits than its factorization.

138479212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036480 (or 2036478 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 138479212 is about 11767.7190653074. The cubic root of 138479212 is about 517.3623983225.

The spelling of 138479212 in words is "one hundred thirty-eight million, four hundred seventy-nine thousand, two hundred twelve".