25520288 has 12 divisors (see below), whose sum is σ = 50243130. Its totient is φ = 12760128.

The previous prime is 25520267. The next prime is 25520291. The reversal of 25520288 is 88202552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 6615184 = 4348^2 + 2572^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 797509 = 25520288 / (2 + 5 + 5 + 2 + 0 + 2 + 8 + 8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398723 + ... + 398786.

Almost surely, 2^25520288 is an apocalyptic number.

It is an amenable number.

25520288 is a deficient number, since it is larger than the sum of its proper divisors (24722842).

25520288 is an equidigital number, since it uses as much as digits as its factorization.

25520288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797519 (or 797511 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 25520288 is about 5051.7608811186. The cubic root of 25520288 is about 294.4163044294.

The spelling of 25520288 in words is "twenty-five million, five hundred twenty thousand, two hundred eighty-eight".