813204804 has 12 divisors (see below), whose sum is σ = 1897477904. Its totient is φ = 271068264.

The previous prime is 813204793. The next prime is 813204817. The reversal of 813204804 is 408402318.

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

It is a super-2 number, since 2×813204804² = 1322604106497356832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33883522 + ... + 33883545.

Almost surely, 2^813204804 is an apocalyptic number.

It is an amenable number.

813204804 is an abundant number, since it is smaller than the sum of its proper divisors (1084273100).

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

813204804 is a wasteful number, since it uses less digits than its factorization.

813204804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67767074 (or 67767072 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 813204804 is about 28516.7460275537. The cubic root of 813204804 is about 933.3975254602.

The spelling of 813204804 in words is "eight hundred thirteen million, two hundred four thousand, eight hundred four".