813585804 has 12 divisors (see below), whose sum is σ = 1898366904. Its totient is φ = 271195264.

The previous prime is 813585791. The next prime is 813585821. The reversal of 813585804 is 408585318.

813585804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33899397 + ... + 33899420.

It is an arithmetic number, because the mean of its divisors is an integer number (158197242).

Almost surely, 2^813585804 is an apocalyptic number.

It is an amenable number.

813585804 is an abundant number, since it is smaller than the sum of its proper divisors (1084781100).

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

813585804 is a wasteful number, since it uses less digits than its factorization.

813585804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67798824 (or 67798822 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 813585804 is about 28523.4255306055. The cubic root of 813585804 is about 933.5432734650.

It can be divided in two parts, 8135 and 85804, that added together give a palindrome (93939).

The spelling of 813585804 in words is "eight hundred thirteen million, five hundred eighty-five thousand, eight hundred four".