25636864 has 52 divisors (see below), whose sum is σ = 56026440. Its totient is φ = 11632640.

The previous prime is 25636861. The next prime is 25636873. The reversal of 25636864 is 46863652.

It is a happy number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25636861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44772 + ... + 45340.

Almost surely, 2^25636864 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 25636864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28013220).

25636864 is an abundant number, since it is smaller than the sum of its proper divisors (30389576).

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

25636864 is an equidigital number, since it uses as much as digits as its factorization.

25636864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 582 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 25636864 is about 5063.2858896175. The cubic root of 25636864 is about 294.8639188510.

It can be divided in two parts, 256 and 36864, that multiplied together give a square (9437184 = 3072²).

The spelling of 25636864 in words is "twenty-five million, six hundred thirty-six thousand, eight hundred sixty-four".