809732816 has 40 divisors (see below), whose sum is σ = 1582261824. Its totient is φ = 401425920.

The previous prime is 809732773. The next prime is 809732837. The reversal of 809732816 is 618237908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417811 + ... + 1418381.

Almost surely, 2^809732816 is an apocalyptic number.

It is an amenable number.

809732816 is a deficient number, since it is larger than the sum of its proper divisors (772529008).

809732816 is a wasteful number, since it uses less digits than its factorization.

809732816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 809732816 is about 28455.8046099561. The cubic root of 809732816 is about 932.0672463406.

The spelling of 809732816 in words is "eight hundred nine million, seven hundred thirty-two thousand, eight hundred sixteen".