2540244 has 24 divisors (see below), whose sum is σ = 6774208. Its totient is φ = 725760.

The previous prime is 2540231. The next prime is 2540249. The reversal of 2540244 is 4420452.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2540244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540249) 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, 15037 + ... + 15204.

2^2540244 is an apocalyptic number.

It is an amenable number.

2540244 is an abundant number, since it is smaller than the sum of its proper divisors (4233964).

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

2540244 is a wasteful number, since it uses less digits than its factorization.

2540244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255 (or 30253 counting only the distinct ones).

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

The square root of 2540244 is about 1593.8142928208. The cubic root of 2540244 is about 136.4452678100.

Adding to 2540244 its reverse (4420452), we get a palindrome (6960696).

The spelling of 2540244 in words is "two million, five hundred forty thousand, two hundred forty-four".