800816 has 10 divisors (see below), whose sum is σ = 1551612. Its totient is φ = 400400.

The previous prime is 800801. The next prime is 800861. The reversal of 800816 is 618008.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 800791 and 800800.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 800816.

It is an unprimeable number.

800816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25010 + ... + 25041.

2⁸⁰⁰⁸¹⁶ is an apocalyptic number.

It is an amenable number.

800816 is a deficient number, since it is larger than the sum of its proper divisors (750796).

800816 is a wasteful number, since it uses less digits than its factorization.

800816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50059 (or 50053 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 800816 is about 894.8832326064. The cubic root of 800816 is about 92.8633287510.

The spelling of 800816 in words is "eight hundred thousand, eight hundred sixteen".