1805944 has 48 divisors (see below), whose sum is σ = 4186080. Its totient is φ = 725760.

The previous prime is 1805941. The next prime is 1805963. The reversal of 1805944 is 4495081.

It is a happy number.

It is a super-2 number, since 2×1805944² = 6522867462272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6529 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (87210).

2^1805944 is an apocalyptic number.

1805944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093040).

1805944 is an abundant number, since it is smaller than the sum of its proper divisors (2380136).

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

1805944 is a wasteful number, since it uses less digits than its factorization.

1805944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1805944 is about 1343.8541587538. The cubic root of 1805944 is about 121.7777913443. Note that the first 4 decimals are identical.

The spelling of 1805944 in words is "one million, eight hundred five thousand, nine hundred forty-four".