138342216 has 16 divisors (see below), whose sum is σ = 345855600. Its totient is φ = 46114064.

The previous prime is 138342163. The next prime is 138342221. The reversal of 138342216 is 612243831.

It is a nude number because it is divisible by every one of its digits.

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, 2882106 + ... + 2882153.

It is an arithmetic number, because the mean of its divisors is an integer number (21615975).

Almost surely, 2^138342216 is an apocalyptic number.

It is an amenable number.

138342216 is an abundant number, since it is smaller than the sum of its proper divisors (207513384).

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

138342216 is a wasteful number, since it uses less digits than its factorization.

138342216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5764268 (or 5764264 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 138342216 is about 11761.8967858080. The cubic root of 138342216 is about 517.1917350067.

The spelling of 138342216 in words is "one hundred thirty-eight million, three hundred forty-two thousand, two hundred sixteen".