813280244 has 18 divisors (see below), whose sum is σ = 1655606610. Its totient is φ = 348548592.

The previous prime is 813280229. The next prime is 813280277. The reversal of 813280244 is 442082318.

It can be written as a sum of positive squares in only one way, i.e., 676624144 + 136656100 = 26012^2 + 11690^2 .

It is a super-2 number, since 2×813280244² = 1322849510561399072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813280244.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2074499 + ... + 2074890.

It is an arithmetic number, because the mean of its divisors is an integer number (91978145).

Almost surely, 2^813280244 is an apocalyptic number.

It is an amenable number.

813280244 is an abundant number, since it is smaller than the sum of its proper divisors (842326366).

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

813280244 is a wasteful number, since it uses less digits than its factorization.

813280244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149407 (or 4149398 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 813280244 is about 28518.0687284395. The cubic root of 813280244 is about 933.4263879442.

The spelling of 813280244 in words is "eight hundred thirteen million, two hundred eighty thousand, two hundred forty-four".