805712 has 20 divisors (see below), whose sum is σ = 1604436. Its totient is φ = 391680.

The previous prime is 805711. The next prime is 805723. The reversal of 805712 is 217508.

It can be written as a sum of positive squares in 2 ways, for example, as 440896 + 364816 = 664^2 + 604^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 1272.

2⁸⁰⁵⁷¹² is an apocalyptic number.

It is an amenable number.

805712 is a deficient number, since it is larger than the sum of its proper divisors (798724).

805712 is a wasteful number, since it uses less digits than its factorization.

805712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 805712 is about 897.6146166368. The cubic root of 805712 is about 93.0521925404.

The spelling of 805712 in words is "eight hundred five thousand, seven hundred twelve".