25906656 has 48 divisors (see below), whose sum is σ = 68272848. Its totient is φ = 8601600.

The previous prime is 25906651. The next prime is 25906679. The reversal of 25906656 is 65660952.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25906651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40096 + ... + 40736.

It is an arithmetic number, because the mean of its divisors is an integer number (1422351).

Almost surely, 2^25906656 is an apocalyptic number.

It is an amenable number.

25906656 is an abundant number, since it is smaller than the sum of its proper divisors (42366192).

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

25906656 is a wasteful number, since it uses less digits than its factorization.

25906656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 25906656 is about 5089.8581512651. The cubic root of 25906656 is about 295.8946545016.

It can be divided in two parts, 25906 and 656, that added together give a palindrome (26562).

The spelling of 25906656 in words is "twenty-five million, nine hundred six thousand, six hundred fifty-six".