25564228 has 24 divisors (see below), whose sum is σ = 45864000. Its totient is φ = 12463968.

The previous prime is 25564223. The next prime is 25564229. The reversal of 25564228 is 82246552.

It is a junction number, because it is equal to n+sod(n) for n = 25564193 and 25564202.

It is not an unprimeable number, because it can be changed into a prime (25564223) 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, 34801 + ... + 35527.

It is an arithmetic number, because the mean of its divisors is an integer number (1911000).

Almost surely, 2^25564228 is an apocalyptic number.

It is an amenable number.

25564228 is a deficient number, since it is larger than the sum of its proper divisors (20299772).

25564228 is a wasteful number, since it uses less digits than its factorization.

25564228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 937 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 25564228 is about 5056.1079893531. The cubic root of 25564228 is about 294.5851796771.

The spelling of 25564228 in words is "twenty-five million, five hundred sixty-four thousand, two hundred twenty-eight".