800289805 has 24 divisors (see below), whose sum is σ = 1135474200. Its totient is φ = 539763840.

The previous prime is 800289799. The next prime is 800289857. The reversal of 800289805 is 508982008.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85636516 + 714653289 = 9254^2 + 26733^2 .

It is not a de Polignac number, because 800289805 - 2⁹ = 800289293 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 11830 + ... + 41719.

It is an arithmetic number, because the mean of its divisors is an integer number (47311425).

Almost surely, 2^800289805 is an apocalyptic number.

It is an amenable number.

800289805 is a deficient number, since it is larger than the sum of its proper divisors (335184395).

800289805 is a wasteful number, since it uses less digits than its factorization.

800289805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53629 (or 53622 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 800289805 is about 28289.3938605973. The cubic root of 800289805 is about 928.4298494937.

The spelling of 800289805 in words is "eight hundred million, two hundred eighty-nine thousand, eight hundred five".