2806805838 has 16 divisors (see below), whose sum is σ = 5621175936. Its totient is φ = 934341240.

The previous prime is 2806805797. The next prime is 2806805849. The reversal of 2806805838 is 8385086082.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 310348 + ... + 319263.

It is an arithmetic number, because the mean of its divisors is an integer number (351323496).

Almost surely, 2^2806805838 is an apocalyptic number.

2806805838 is an abundant number, since it is smaller than the sum of its proper divisors (2814370098).

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

2806805838 is a wasteful number, since it uses less digits than its factorization.

2806805838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630359.

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 2806805838 is about 52979.2963146926. The cubic root of 2806805838 is about 1410.6007932120.

The spelling of 2806805838 in words is "two billion, eight hundred six million, eight hundred five thousand, eight hundred thirty-eight".