2138085808 has 20 divisors (see below), whose sum is σ = 4360570360. Its totient is φ = 1012777344.

The previous prime is 2138085797. The next prime is 2138085809. The reversal of 2138085808 is 8085808312.

It is not an unprimeable number, because it can be changed into a prime (2138085809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516285 + ... + 3516892.

It is an arithmetic number, because the mean of its divisors is an integer number (218028518).

Almost surely, 2^2138085808 is an apocalyptic number.

It is an amenable number.

2138085808 is an abundant number, since it is smaller than the sum of its proper divisors (2222484552).

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

2138085808 is a wasteful number, since it uses less digits than its factorization.

2138085808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033204 (or 7033198 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 2138085808 is about 46239.4399620065. The cubic root of 2138085808 is about 1288.2744004694.

The spelling of 2138085808 in words is "two billion, one hundred thirty-eight million, eighty-five thousand, eight hundred eight".