25220448 has 144 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 7223040.

The previous prime is 25220431. The next prime is 25220449. The reversal of 25220448 is 84402252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59983 + ... + 60401.

It is an arithmetic number, because the mean of its divisors is an integer number (573300).

Almost surely, 2^25220448 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 25220448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41277600).

25220448 is an abundant number, since it is smaller than the sum of its proper divisors (57334752).

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

25220448 is a wasteful number, since it uses less digits than its factorization.

25220448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 25220448 is about 5021.9964157693. The cubic root of 25220448 is about 293.2587183956.

It can be divided in two parts, 252204 and 48, that added together give a palindrome (252252).

The spelling of 25220448 in words is "twenty-five million, two hundred twenty thousand, four hundred forty-eight".