820795 has 8 divisors (see below), whose sum is σ = 992880. Its totient is φ = 651360.

The previous prime is 820793. The next prime is 820837. The reversal of 820795 is 597028.

820795 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820795 - 2¹ = 820793 is a prime.

It is an Ulam number.

820795 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (820793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (124110).

2⁸²⁰⁷⁹⁵ is an apocalyptic number.

820795 is a deficient number, since it is larger than the sum of its proper divisors (172085).

820795 is a wasteful number, since it uses less digits than its factorization.

820795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 820795 is about 905.9773727859. The cubic root of 820795 is about 93.6292549238.

The spelling of 820795 in words is "eight hundred twenty thousand, seven hundred ninety-five".