25536240 has 120 divisors (see below), whose sum is σ = 88788960. Its totient is φ = 6569472.

The previous prime is 25536239. The next prime is 25536257. The reversal of 25536240 is 4263552.

It is a tau number, because it is divible by the number of its divisors (120).

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, 20269 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (739908).

Almost surely, 2^25536240 is an apocalyptic number.

25536240 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 25536240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44394480).

25536240 is an abundant number, since it is smaller than the sum of its proper divisors (63252720).

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

25536240 is a wasteful number, since it uses less digits than its factorization.

25536240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25536240 is about 5053.3394898819. The cubic root of 25536240 is about 294.4776353814.

Adding to 25536240 its reverse (4263552), we get a palindrome (29799792).

The spelling of 25536240 in words is "twenty-five million, five hundred thirty-six thousand, two hundred forty".