138215468 has 6 divisors (see below), whose sum is σ = 241877076. Its totient is φ = 69107732.

The previous prime is 138215437. The next prime is 138215489. The reversal of 138215468 is 864512831.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17276930 + ... + 17276937.

It is an arithmetic number, because the mean of its divisors is an integer number (40312846).

Almost surely, 2^138215468 is an apocalyptic number.

It is an amenable number.

138215468 is a deficient number, since it is larger than the sum of its proper divisors (103661608).

138215468 is a wasteful number, since it uses less digits than its factorization.

138215468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34553871 (or 34553869 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 138215468 is about 11756.5074745861. The cubic root of 138215468 is about 517.0337378076.

The spelling of 138215468 in words is "one hundred thirty-eight million, two hundred fifteen thousand, four hundred sixty-eight".