25668224 has 32 divisors (see below), whose sum is σ = 51571200. Its totient is φ = 12724992.

The previous prime is 25668211. The next prime is 25668229. The reversal of 25668224 is 42286652.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (25668229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15467 + ... + 17045.

It is an arithmetic number, because the mean of its divisors is an integer number (1611600).

Almost surely, 2^25668224 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 25668224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25785600).

25668224 is an abundant number, since it is smaller than the sum of its proper divisors (25902976).

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

25668224 is a wasteful number, since it uses less digits than its factorization.

25668224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1708 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 25668224 is about 5066.3817463748. The cubic root of 25668224 is about 294.9840994973.

The spelling of 25668224 in words is "twenty-five million, six hundred sixty-eight thousand, two hundred twenty-four".