138020216 has 8 divisors (see below), whose sum is σ = 258787920. Its totient is φ = 69010104.

The previous prime is 138020203. The next prime is 138020243. The reversal of 138020216 is 612020831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 138020191 and 138020200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8626256 + ... + 8626271.

It is an arithmetic number, because the mean of its divisors is an integer number (32348490).

Almost surely, 2^138020216 is an apocalyptic number.

It is an amenable number.

138020216 is a deficient number, since it is larger than the sum of its proper divisors (120767704).

138020216 is a wasteful number, since it uses less digits than its factorization.

138020216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17252533 (or 17252529 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 138020216 is about 11748.2005430619. The cubic root of 138020216 is about 516.7901581099.

The spelling of 138020216 in words is "one hundred thirty-eight million, twenty thousand, two hundred sixteen".