2544040 has 16 divisors (see below), whose sum is σ = 5724180. Its totient is φ = 1017600.

The previous prime is 2544029. The next prime is 2544041. The reversal of 2544040 is 404452.

It can be written as a sum of positive squares in 2 ways, for example, as 2477476 + 66564 = 1574^2 + 258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2543999 and 2544017.

It is not an unprimeable number, because it can be changed into a prime (2544041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31761 + ... + 31840.

2^2544040 is an apocalyptic number.

2544040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2544040 is an abundant number, since it is smaller than the sum of its proper divisors (3180140).

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

2544040 is a wasteful number, since it uses less digits than its factorization.

2544040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63612 (or 63608 counting only the distinct ones).

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

The square root of 2544040 is about 1595.0047021874. The cubic root of 2544040 is about 136.5131994016.

Adding to 2544040 its reverse (404452), we get a palindrome (2948492).

The spelling of 2544040 in words is "two million, five hundred forty-four thousand, forty".