25989564 has 24 divisors (see below), whose sum is σ = 60773328. Its totient is φ = 8644480.

The previous prime is 25989553. The next prime is 25989571. The reversal of 25989564 is 46598952.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4174 + ... + 8330.

It is an arithmetic number, because the mean of its divisors is an integer number (2532222).

Almost surely, 2^25989564 is an apocalyptic number.

It is an amenable number.

25989564 is an abundant number, since it is smaller than the sum of its proper divisors (34783764).

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

25989564 is a wasteful number, since it uses less digits than its factorization.

25989564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685 (or 4683 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 25989564 is about 5097.9960768914. The cubic root of 25989564 is about 296.2099648582.

The spelling of 25989564 in words is "twenty-five million, nine hundred eighty-nine thousand, five hundred sixty-four".