138618835 has 16 divisors (see below), whose sum is σ = 172778400. Its totient is φ = 106672896.

The previous prime is 138618817. The next prime is 138618841. The reversal of 138618835 is 538816831.

It is a cyclic number.

It is not a de Polignac number, because 138618835 - 2⁵ = 138618803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138618791 and 138618800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12256 + ... + 20674.

It is an arithmetic number, because the mean of its divisors is an integer number (10798650).

Almost surely, 2^138618835 is an apocalyptic number.

138618835 is a deficient number, since it is larger than the sum of its proper divisors (34159565).

138618835 is an equidigital number, since it uses as much as digits as its factorization.

138618835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8550.

The product of its digits is 138240, while the sum is 43.

The square root of 138618835 is about 11773.6500287719. The cubic root of 138618835 is about 517.5362184582.

The spelling of 138618835 in words is "one hundred thirty-eight million, six hundred eighteen thousand, eight hundred thirty-five".