138147212 has 12 divisors (see below), whose sum is σ = 276294480. Its totient is φ = 59205936.

The previous prime is 138147211. The next prime is 138147239. The reversal of 138147212 is 212741831.

138147212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138147211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2466887 + ... + 2466942.

It is an arithmetic number, because the mean of its divisors is an integer number (23024540).

Almost surely, 2^138147212 is an apocalyptic number.

It is an amenable number.

138147212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138147212 is a wasteful number, since it uses less digits than its factorization.

138147212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933840 (or 4933838 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 138147212 is about 11753.6042131765. The cubic root of 138147212 is about 516.9486135539.

The spelling of 138147212 in words is "one hundred thirty-eight million, one hundred forty-seven thousand, two hundred twelve".