813288844 has 48 divisors (see below), whose sum is σ = 1572121600. Its totient is φ = 366638400.

The previous prime is 813288841. The next prime is 813288851. The reversal of 813288844 is 448882318.

It is a happy number.

813288844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×813288844² = 1322877487549712672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813288794 and 813288803.

It is not an unprimeable number, because it can be changed into a prime (813288841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140887 + ... + 146545.

Almost surely, 2^813288844 is an apocalyptic number.

It is an amenable number.

813288844 is a deficient number, since it is larger than the sum of its proper divisors (758832756).

813288844 is a wasteful number, since it uses less digits than its factorization.

813288844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774 (or 5772 counting only the distinct ones).

The product of its digits is 393216, while the sum is 46.

The square root of 813288844 is about 28518.2195096398. The cubic root of 813288844 is about 933.4296780929.

The spelling of 813288844 in words is "eight hundred thirteen million, two hundred eighty-eight thousand, eight hundred forty-four".