813600868 has 12 divisors (see below), whose sum is σ = 1424329452. Its totient is φ = 406649600.

The previous prime is 813600863. The next prime is 813600869. The reversal of 813600868 is 868006318.

It can be written as a sum of positive squares in 2 ways, for example, as 661621284 + 151979584 = 25722^2 + 12328^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 813600868.

It is not an unprimeable number, because it can be changed into a prime (813600863) by changing a digit.

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, 25105 + ... + 47512.

It is an arithmetic number, because the mean of its divisors is an integer number (118694121).

Almost surely, 2^813600868 is an apocalyptic number.

It is an amenable number.

813600868 is a deficient number, since it is larger than the sum of its proper divisors (610728584).

813600868 is a wasteful number, since it uses less digits than its factorization.

813600868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75422 (or 75420 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 813600868 is about 28523.6895930383. The cubic root of 813600868 is about 933.5490351228.

The spelling of 813600868 in words is "eight hundred thirteen million, six hundred thousand, eight hundred sixty-eight".