809895996 has 180 divisors, whose sum is σ = 2621376912. Its totient is φ = 213497856.

The previous prime is 809895991. The next prime is 809896007. The reversal of 809895996 is 699598908.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809895991) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 382236 + ... + 384348.

Almost surely, 2^809895996 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 809895996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310688456).

809895996 is an abundant number, since it is smaller than the sum of its proper divisors (1811480916).

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

809895996 is a wasteful number, since it uses less digits than its factorization.

809895996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The square root of 809895996 is about 28458.6717188276. The cubic root of 809895996 is about 932.1298532131.

The spelling of 809895996 in words is "eight hundred nine million, eight hundred ninety-five thousand, nine hundred ninety-six".