804866 has 8 divisors (see below), whose sum is σ = 1249020. Its totient is φ = 388528.

The previous prime is 804857. The next prime is 804877. The reversal of 804866 is 668408.

It can be written as a sum of positive squares in 2 ways, for example, as 758641 + 46225 = 871^2 + 215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is an unprimeable number.

804866 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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6881 + ... + 6996.

2⁸⁰⁴⁸⁶⁶ is an apocalyptic number.

804866 is a deficient number, since it is larger than the sum of its proper divisors (444154).

804866 is a wasteful number, since it uses less digits than its factorization.

804866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13908.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 804866 is about 897.1432438580. The cubic root of 804866 is about 93.0196127750.

The spelling of 804866 in words is "eight hundred four thousand, eight hundred sixty-six".