813204680 has 16 divisors (see below), whose sum is σ = 1829710620. Its totient is φ = 325281856.

The previous prime is 813204671. The next prime is 813204719. The reversal of 813204680 is 86402318.

It can be written as a sum of positive squares in 2 ways, for example, as 810996484 + 2208196 = 28478^2 + 1486^2 .

It is a super-2 number, since 2×813204680² = 1322603703147804800, 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, 10165019 + ... + 10165098.

Almost surely, 2^813204680 is an apocalyptic number.

It is an amenable number.

813204680 is an abundant number, since it is smaller than the sum of its proper divisors (1016505940).

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

813204680 is a wasteful number, since it uses less digits than its factorization.

813204680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20330128 (or 20330124 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 813204680 is about 28516.7438533925. The cubic root of 813204680 is about 933.3974780178.

Adding to 813204680 its reverse (86402318), we get a palindrome (899606998).

The spelling of 813204680 in words is "eight hundred thirteen million, two hundred four thousand, six hundred eighty".