809072 has 20 divisors (see below), whose sum is σ = 1710456. Its totient is φ = 367680.

The previous prime is 809063. The next prime is 809087. The reversal of 809072 is 270908.

It is a congruent number.

It is an unprimeable number.

809072 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123 + ... + 2474.

2⁸⁰⁹⁰⁷² is an apocalyptic number.

It is an amenable number.

809072 is an abundant number, since it is smaller than the sum of its proper divisors (901384).

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

809072 is a wasteful number, since it uses less digits than its factorization.

809072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 4610 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 809072 is about 899.4842966945. The cubic root of 809072 is about 93.1813626643.

The spelling of 809072 in words is "eight hundred nine thousand, seventy-two".