813809504 has 24 divisors (see below), whose sum is σ = 1605562560. Its totient is φ = 406047616.

The previous prime is 813809467. The next prime is 813809531. The reversal of 813809504 is 405908318.

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 3 ways as a sum of consecutive naturals, for example, 11219 + ... + 41874.

It is an arithmetic number, because the mean of its divisors is an integer number (66898440).

Almost surely, 2^813809504 is an apocalyptic number.

It is an amenable number.

813809504 is a deficient number, since it is larger than the sum of its proper divisors (791753056).

813809504 is a wasteful number, since it uses less digits than its factorization.

813809504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53582 (or 53574 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 813809504 is about 28527.3465993597. The cubic root of 813809504 is about 933.6288266184.

The spelling of 813809504 in words is "eight hundred thirteen million, eight hundred nine thousand, five hundred four".