1808244 has 30 divisors (see below), whose sum is σ = 4727954. Its totient is φ = 602640.

The previous prime is 1808243. The next prime is 1808269. The reversal of 1808244 is 4428081.

It can be written as a sum of positive squares in only one way, i.e., 1411344 + 396900 = 1188^2 + 630^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808243) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 2467 + ... + 3114.

2^1808244 is an apocalyptic number.

It is an amenable number.

1808244 is an abundant number, since it is smaller than the sum of its proper divisors (2919710).

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

1808244 is a wasteful number, since it uses less digits than its factorization.

1808244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5597 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1808244 is about 1344.7096340846. The cubic root of 1808244 is about 121.8294670145.

The spelling of 1808244 in words is "one million, eight hundred eight thousand, two hundred forty-four".