2544240 has 40 divisors (see below), whose sum is σ = 7887888. Its totient is φ = 678400.

The previous prime is 2544239. The next prime is 2544247. The reversal of 2544240 is 424452.

2544240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5061 + ... + 5540.

2^2544240 is an apocalyptic number.

2544240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2544240 is an abundant number, since it is smaller than the sum of its proper divisors (5343648).

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

2544240 is a wasteful number, since it uses less digits than its factorization.

2544240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10617 (or 10611 counting only the distinct ones).

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

The square root of 2544240 is about 1595.0673966952. The cubic root of 2544240 is about 136.5167766416.

Adding to 2544240 its reverse (424452), we get a palindrome (2968692).

The spelling of 2544240 in words is "two million, five hundred forty-four thousand, two hundred forty".