810444 has 12 divisors (see below), whose sum is σ = 1891064. Its totient is φ = 270144.

The previous prime is 810443. The next prime is 810457. The reversal of 810444 is 444018.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 810444.

It is not an unprimeable number, because it can be changed into a prime (810443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33757 + ... + 33780.

2⁸¹⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

810444 is an abundant number, since it is smaller than the sum of its proper divisors (1080620).

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

810444 is a wasteful number, since it uses less digits than its factorization.

810444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67544 (or 67542 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 810444 is about 900.2466328735. The cubic root of 810444 is about 93.2340043049.

The spelling of 810444 in words is "eight hundred ten thousand, four hundred forty-four".