25985216 has 56 divisors (see below), whose sum is σ = 54620160. Its totient is φ = 12241152.

The previous prime is 25985209. The next prime is 25985249. The reversal of 25985216 is 61258952.

It is a self number, because there is not a number n which added to its sum of digits gives 25985216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186875 + ... + 187013.

It is an arithmetic number, because the mean of its divisors is an integer number (975360).

Almost surely, 2^25985216 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 25985216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27310080).

25985216 is an abundant number, since it is smaller than the sum of its proper divisors (28634944).

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

25985216 is a wasteful number, since it uses less digits than its factorization.

25985216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 291 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 25985216 is about 5097.5696169842. The cubic root of 25985216 is about 296.1934454999.

The spelling of 25985216 in words is "twenty-five million, nine hundred eighty-five thousand, two hundred sixteen".