809798544 has 120 divisors (see below), whose sum is σ = 2444114400. Its totient is φ = 249454080.

The previous prime is 809798543. The next prime is 809798551. The reversal of 809798544 is 445897908.

809798544 is a `hidden beast` number, since 8 + 0 + 9 + 7 + 98 + 544 = 666.

It is not an unprimeable number, because it can be changed into a prime (809798543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108567 + ... + 115785.

It is an arithmetic number, because the mean of its divisors is an integer number (20367620).

Almost surely, 2^809798544 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 809798544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222057200).

809798544 is an abundant number, since it is smaller than the sum of its proper divisors (1634315856).

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

809798544 is a wasteful number, since it uses less digits than its factorization.

809798544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7293 (or 7284 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 809798544 is about 28456.9595002699. The cubic root of 809798544 is about 932.0924650535.

The spelling of 809798544 in words is "eight hundred nine million, seven hundred ninety-eight thousand, five hundred forty-four".