25805268 has 72 divisors (see below), whose sum is σ = 70936320. Its totient is φ = 7879680.

The previous prime is 25805267. The next prime is 25805291. The reversal of 25805268 is 86250852.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25805267) 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 23 ways as a sum of consecutive naturals, for example, 20596 + ... + 21812.

Almost surely, 2^25805268 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 25805268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35468160).

25805268 is an abundant number, since it is smaller than the sum of its proper divisors (45131052).

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

25805268 is a wasteful number, since it uses less digits than its factorization.

25805268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 25805268 is about 5079.8885814553. Note that the first 3 decimals coincide. The cubic root of 25805268 is about 295.5081465111.

The spelling of 25805268 in words is "twenty-five million, eight hundred five thousand, two hundred sixty-eight".