809999996 has 12 divisors (see below), whose sum is σ = 1526538552. Its totient is φ = 373846128.

The previous prime is 809999989. The next prime is 809999999. The reversal of 809999996 is 699999908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809999999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7788410 + ... + 7788513.

It is an arithmetic number, because the mean of its divisors is an integer number (127211546).

Almost surely, 2^809999996 is an apocalyptic number.

It is an amenable number.

809999996 is a deficient number, since it is larger than the sum of its proper divisors (716538556).

809999996 is a wasteful number, since it uses less digits than its factorization.

809999996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15576940 (or 15576938 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 68.

The square root of 809999996 is about 28460.4988712426. The cubic root of 809999996 is about 932.1697502517.

The spelling of 809999996 in words is "eight hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-six".