25440044 has 12 divisors (see below), whose sum is σ = 50880144. Its totient is φ = 10902864.

The previous prime is 25440043. The next prime is 25440061. The reversal of 25440044 is 44004452.

25440044 is an admirable number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25440043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454259 + ... + 454314.

It is an arithmetic number, because the mean of its divisors is an integer number (4240012).

Almost surely, 2^25440044 is an apocalyptic number.

It is an amenable number.

25440044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25440044 is a wasteful number, since it uses less digits than its factorization.

25440044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908584 (or 908582 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 25440044 is about 5043.8124469492. The cubic root of 25440044 is about 294.1074005623.

Adding to 25440044 its reverse (44004452), we get a palindrome (69444496).

The spelling of 25440044 in words is "twenty-five million, four hundred forty thousand, forty-four".