2005444 has 24 divisors (see below), whose sum is σ = 4074560. Its totient is φ = 845856.

The previous prime is 2005441. The next prime is 2005447. The reversal of 2005444 is 4445002.

It is an interprime number because it is at equal distance from previous prime (2005441) and next prime (2005447).

It is not an unprimeable number, because it can be changed into a prime (2005441) 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 7 ways as a sum of consecutive naturals, for example, 1342 + ... + 2410.

2^2005444 is an apocalyptic number.

It is an amenable number.

2005444 is an abundant number, since it is smaller than the sum of its proper divisors (2069116).

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

2005444 is a wasteful number, since it uses less digits than its factorization.

2005444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 2005444 is about 1416.1369990223. The cubic root of 2005444 is about 126.1063182592.

The spelling of 2005444 in words is "two million, five thousand, four hundred forty-four".