25890656 has 24 divisors (see below), whose sum is σ = 55606824. Its totient is φ = 11768320.

The previous prime is 25890653. The next prime is 25890679. The reversal of 25890656 is 65609852.

It is a super-2 number, since 2×25890656² = 1340652136220672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890653) 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 3 ways as a sum of consecutive naturals, for example, 36425 + ... + 37128.

It is an arithmetic number, because the mean of its divisors is an integer number (2316951).

Almost surely, 2^25890656 is an apocalyptic number.

It is an amenable number.

25890656 is an abundant number, since it is smaller than the sum of its proper divisors (29716168).

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

25890656 is a wasteful number, since it uses less digits than its factorization.

25890656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73574 (or 73566 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 25890656 is about 5088.2861554751. The cubic root of 25890656 is about 295.8337269231.

The spelling of 25890656 in words is "twenty-five million, eight hundred ninety thousand, six hundred fifty-six".