809768 has 8 divisors (see below), whose sum is σ = 1518330. Its totient is φ = 404880.

The previous prime is 809759. The next prime is 809771. The reversal of 809768 is 867908.

It can be written as a sum of positive squares in only one way, i.e., 806404 + 3364 = 898^2 + 58^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50603 + ... + 50618.

2⁸⁰⁹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

809768 is a deficient number, since it is larger than the sum of its proper divisors (708562).

809768 is a wasteful number, since it uses less digits than its factorization.

809768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101227 (or 101223 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 809768 is about 899.8711018807. The cubic root of 809768 is about 93.2080746011.

The spelling of 809768 in words is "eight hundred nine thousand, seven hundred sixty-eight".