805536 has 36 divisors (see below), whose sum is σ = 2291562. Its totient is φ = 268416.

The previous prime is 805531. The next prime is 805537. The reversal of 805536 is 635508.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 197136 = 780^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805536.

It is not an unprimeable number, because it can be changed into a prime (805531) by changing a digit.

805536 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 in 5 ways as a sum of consecutive naturals, for example, 1111 + ... + 1686.

2⁸⁰⁵⁵³⁶ is an apocalyptic number.

It is an amenable number.

805536 is an abundant number, since it is smaller than the sum of its proper divisors (1486026).

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

805536 is a wasteful number, since it uses less digits than its factorization.

805536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2802 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 805536 is about 897.5165736631. The cubic root of 805536 is about 93.0454165962.

The spelling of 805536 in words is "eight hundred five thousand, five hundred thirty-six".