872805 has 16 divisors (see below), whose sum is σ = 1442304. Its totient is φ = 450240.

The previous prime is 872791. The next prime is 872843. The reversal of 872805 is 508278.

872805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 872805 - 2⁴ = 872789 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 872805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (90144).

2⁸⁷²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

872805 is a deficient number, since it is larger than the sum of its proper divisors (569499).

872805 is a wasteful number, since it uses less digits than its factorization.

872805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 872805 is about 934.2403331049. The cubic root of 872805 is about 95.5665134260.

The spelling of 872805 in words is "eight hundred seventy-two thousand, eight hundred five".