809244 has 48 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 263088.

The previous prime is 809243. The next prime is 809261. The reversal of 809244 is 442908.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6309 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (44800).

2⁸⁰⁹²⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075200).

809244 is an abundant number, since it is smaller than the sum of its proper divisors (1341156).

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

809244 is a wasteful number, since it uses less digits than its factorization.

809244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 809244 is about 899.5799019542. The cubic root of 809244 is about 93.1879653147.

The spelling of 809244 in words is "eight hundred nine thousand, two hundred forty-four".