809081044 has 12 divisors (see below), whose sum is σ = 1450426068. Its totient is φ = 394673600.

The previous prime is 809081029. The next prime is 809081081. The reversal of 809081044 is 440180908.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 797384644 = 3420^2 + 28238^2 .

It is a super-2 number, since 2×809081044² = 1309224271520259872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2466547 + ... + 2466874.

It is an arithmetic number, because the mean of its divisors is an integer number (120868839).

Almost surely, 2^809081044 is an apocalyptic number.

It is an amenable number.

809081044 is a deficient number, since it is larger than the sum of its proper divisors (641345024).

809081044 is a wasteful number, since it uses less digits than its factorization.

809081044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933466 (or 4933464 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 809081044 is about 28444.3499486278. The cubic root of 809081044 is about 931.8170986418.

The spelling of 809081044 in words is "eight hundred nine million, eighty-one thousand, forty-four".