25052440 has 64 divisors (see below), whose sum is σ = 65007360. Its totient is φ = 8511360.

The previous prime is 25052437. The next prime is 25052449. The reversal of 25052440 is 4425052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25052449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36339 + ... + 37021.

It is an arithmetic number, because the mean of its divisors is an integer number (1015740).

Almost surely, 2^25052440 is an apocalyptic number.

25052440 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 25052440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32503680).

25052440 is an abundant number, since it is smaller than the sum of its proper divisors (39954920).

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

25052440 is a wasteful number, since it uses less digits than its factorization.

25052440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25052440 is about 5005.2412529268. The cubic root of 25052440 is about 292.6060783583.

Adding to 25052440 its reverse (4425052), we get a palindrome (29477492).

The spelling of 25052440 in words is "twenty-five million, fifty-two thousand, four hundred forty".