25648256 has 32 divisors (see below), whose sum is σ = 51473280. Its totient is φ = 12729600.

The previous prime is 25648201. The next prime is 25648277. The reversal of 25648256 is 65284652.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18665 + ... + 19991.

It is an arithmetic number, because the mean of its divisors is an integer number (1608540).

Almost surely, 2^25648256 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 25648256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25736640).

25648256 is an abundant number, since it is smaller than the sum of its proper divisors (25825024).

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

25648256 is a wasteful number, since it uses less digits than its factorization.

25648256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1480 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 25648256 is about 5064.4107258397. The cubic root of 25648256 is about 294.9075876390.

The spelling of 25648256 in words is "twenty-five million, six hundred forty-eight thousand, two hundred fifty-six".