25896656 has 40 divisors (see below), whose sum is σ = 52377600. Its totient is φ = 12389760.

The previous prime is 25896649. The next prime is 25896667. The reversal of 25896656 is 65669852.

It is a self number, because there is not a number n which added to its sum of digits gives 25896656.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53825 + ... + 54303.

It is an arithmetic number, because the mean of its divisors is an integer number (1309440).

Almost surely, 2^25896656 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 25896656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26188800).

25896656 is an abundant number, since it is smaller than the sum of its proper divisors (26480944).

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

25896656 is a wasteful number, since it uses less digits than its factorization.

25896656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 25896656 is about 5088.8757108029. The cubic root of 25896656 is about 295.8565777059.

The spelling of 25896656 in words is "twenty-five million, eight hundred ninety-six thousand, six hundred fifty-six".