809084840 has 16 divisors (see below), whose sum is σ = 1820440980. Its totient is φ = 323633920.

The previous prime is 809084839. The next prime is 809084917. The reversal of 809084840 is 48480908.

It can be written as a sum of positive squares in 2 ways, for example, as 745180804 + 63904036 = 27298^2 + 7994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10113521 + ... + 10113600.

Almost surely, 2^809084840 is an apocalyptic number.

It is an amenable number.

809084840 is an abundant number, since it is smaller than the sum of its proper divisors (1011356140).

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

809084840 is a wasteful number, since it uses less digits than its factorization.

809084840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20227132 (or 20227128 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 809084840 is about 28444.4166753337. The cubic root of 809084840 is about 931.8185559215.

The spelling of 809084840 in words is "eight hundred nine million, eighty-four thousand, eight hundred forty".