25448660 has 72 divisors (see below), whose sum is σ = 59262840. Its totient is φ = 9146368.

The previous prime is 25448653. The next prime is 25448681. The reversal of 25448660 is 6684452.

It can be written as a sum of positive squares in 12 ways, for example, as 4963984 + 20484676 = 2228^2 + 4526^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25448660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285896 + ... + 285984.

It is an arithmetic number, because the mean of its divisors is an integer number (823095).

Almost surely, 2^25448660 is an apocalyptic number.

25448660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25448660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29631420).

25448660 is an abundant number, since it is smaller than the sum of its proper divisors (33814180).

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

25448660 is a wasteful number, since it uses less digits than its factorization.

25448660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 142 counting only the distinct ones).

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

The square root of 25448660 is about 5044.6664904630. Note that the first 3 decimals coincide. The cubic root of 25448660 is about 294.1405994480.

The spelling of 25448660 in words is "twenty-five million, four hundred forty-eight thousand, six hundred sixty".