2520444 has 12 divisors (see below), whose sum is σ = 5881064. Its totient is φ = 840144.

The previous prime is 2520443. The next prime is 2520451. The reversal of 2520444 is 4440252.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2520444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520443) 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 3 ways as a sum of consecutive naturals, for example, 105007 + ... + 105030.

2^2520444 is an apocalyptic number.

It is an amenable number.

2520444 is an abundant number, since it is smaller than the sum of its proper divisors (3360620).

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

2520444 is a wasteful number, since it uses less digits than its factorization.

2520444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210044 (or 210042 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 2520444 is about 1587.5906273344. The cubic root of 2520444 is about 136.0898339579.

Adding to 2520444 its reverse (4440252), we get a palindrome (6960696).

The spelling of 2520444 in words is "two million, five hundred twenty thousand, four hundred forty-four".