138348785 has 16 divisors (see below), whose sum is σ = 176030400. Its totient is φ = 104089536.

The previous prime is 138348781. The next prime is 138348787. The reversal of 138348785 is 587843831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138348785 - 2² = 138348781 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138348781) by changing a digit.

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, 7967 + ... + 18443.

It is an arithmetic number, because the mean of its divisors is an integer number (11001900).

Almost surely, 2^138348785 is an apocalyptic number.

It is an amenable number.

138348785 is a deficient number, since it is larger than the sum of its proper divisors (37681615).

138348785 is a wasteful number, since it uses less digits than its factorization.

138348785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10640.

The product of its digits is 645120, while the sum is 47.

The square root of 138348785 is about 11762.1760316703. The cubic root of 138348785 is about 517.1999209358.

The spelling of 138348785 in words is "one hundred thirty-eight million, three hundred forty-eight thousand, seven hundred eighty-five".