805864 has 8 divisors (see below), whose sum is σ = 1511010. Its totient is φ = 402928.

The previous prime is 805859. The next prime is 805867. The reversal of 805864 is 468508.

805864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 116964 = 830^2 + 342^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (805867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50359 + ... + 50374.

2⁸⁰⁵⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

805864 is a deficient number, since it is larger than the sum of its proper divisors (705146).

805864 is a wasteful number, since it uses less digits than its factorization.

805864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100739 (or 100735 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 805864 is about 897.6992814969. The cubic root of 805864 is about 93.0580436981.

The spelling of 805864 in words is "eight hundred five thousand, eight hundred sixty-four".