1800244 has 12 divisors (see below), whose sum is σ = 3180100. Its totient is φ = 891648.

The previous prime is 1800221. The next prime is 1800257. The reversal of 1800244 is 4420081.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 672400 = 1062^2 + 820^2 .

It is a congruent number.

It is an unprimeable number.

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, 1629 + ... + 2500.

2^1800244 is an apocalyptic number.

It is an amenable number.

1800244 is a deficient number, since it is larger than the sum of its proper divisors (1379856).

1800244 is a wasteful number, since it uses less digits than its factorization.

1800244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242 (or 4240 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1800244 is about 1341.7317168495. The cubic root of 1800244 is about 121.6495361716.

The spelling of 1800244 in words is "one million, eight hundred thousand, two hundred forty-four".