805809798 has 24 divisors (see below), whose sum is σ = 1837812600. Its totient is φ = 254466144.

The previous prime is 805809757. The next prime is 805809811. The reversal of 805809798 is 897908508.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1177743 + ... + 1178426.

It is an arithmetic number, because the mean of its divisors is an integer number (76575525).

Almost surely, 2^805809798 is an apocalyptic number.

805809798 is an abundant number, since it is smaller than the sum of its proper divisors (1032002802).

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

805809798 is a wasteful number, since it uses less digits than its factorization.

805809798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356196 (or 2356193 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 805809798 is about 28386.7891456572. The cubic root of 805809798 is about 930.5595730583.

The spelling of 805809798 in words is "eight hundred five million, eight hundred nine thousand, seven hundred ninety-eight".