1809244 has 12 divisors (see below), whose sum is σ = 3199504. Its totient is φ = 895104.

The previous prime is 1809233. The next prime is 1809271. The reversal of 1809244 is 4429081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944 + ... + 2719.

2^1809244 is an apocalyptic number.

It is an amenable number.

1809244 is a deficient number, since it is larger than the sum of its proper divisors (1390260).

1809244 is a wasteful number, since it uses less digits than its factorization.

1809244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764 (or 4762 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1809244 is about 1345.0814101756. The cubic root of 1809244 is about 121.8519210299.

The spelling of 1809244 in words is "one million, eight hundred nine thousand, two hundred forty-four".