813693244 has 48 divisors (see below), whose sum is σ = 1755479488. Its totient is φ = 321366528.

The previous prime is 813693197. The next prime is 813693313. The reversal of 813693244 is 442396318.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 813693197 and 813693206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274072 + ... + 277024.

Almost surely, 2^813693244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813693244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877739744).

813693244 is an abundant number, since it is smaller than the sum of its proper divisors (941786244).

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

813693244 is a wasteful number, since it uses less digits than its factorization.

813693244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 3732 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 813693244 is about 28525.3088326840. The cubic root of 813693244 is about 933.5843654121.

The spelling of 813693244 in words is "eight hundred thirteen million, six hundred ninety-three thousand, two hundred forty-four".