25440244 has 12 divisors (see below), whose sum is σ = 44556064. Its totient is φ = 12709944.

The previous prime is 25440241. The next prime is 25440263. The reversal of 25440244 is 44204452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440241) 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, 7369 + ... + 10255.

Almost surely, 2^25440244 is an apocalyptic number.

It is an amenable number.

25440244 is a deficient number, since it is larger than the sum of its proper divisors (19115820).

25440244 is a wasteful number, since it uses less digits than its factorization.

25440244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094 (or 5092 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 25440244 is about 5043.8322731828. The cubic root of 25440244 is about 294.1081712806.

Adding to 25440244 its reverse (44204452), we get a palindrome (69644696).

The spelling of 25440244 in words is "twenty-five million, four hundred forty thousand, two hundred forty-four".