820244 has 12 divisors (see below), whose sum is σ = 1466304. Its totient is φ = 401304.

The previous prime is 820243. The next prime is 820247. The reversal of 820244 is 442028.

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 820244.

It is not an unprimeable number, because it can be changed into a prime (820241) 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, 1994 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (122192).

2⁸²⁰²⁴⁴ is an apocalyptic number.

It is an amenable number.

820244 is a deficient number, since it is larger than the sum of its proper divisors (646060).

820244 is a wasteful number, since it uses less digits than its factorization.

820244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 820244 is about 905.6732302547. The cubic root of 820244 is about 93.6082991156.

It can be divided in two parts, 82024 and 4, that added together give a palindrome (82028).

The spelling of 820244 in words is "eight hundred twenty thousand, two hundred forty-four".