25644256 has 72 divisors (see below), whose sum is σ = 57312360. Its totient is φ = 11278080.

The previous prime is 25644253. The next prime is 25644257. The reversal of 25644256 is 65244652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25644251) 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 11 ways as a sum of consecutive naturals, for example, 143175 + ... + 143353.

It is an arithmetic number, because the mean of its divisors is an integer number (796005).

Almost surely, 2^25644256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25644256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28656180).

25644256 is an abundant number, since it is smaller than the sum of its proper divisors (31668104).

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

25644256 is a wasteful number, since it uses less digits than its factorization.

25644256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 229 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 25644256 is about 5064.0157977637. The cubic root of 25644256 is about 294.8922559704.

The spelling of 25644256 in words is "twenty-five million, six hundred forty-four thousand, two hundred fifty-six".