25036240 has 80 divisors (see below), whose sum is σ = 63277200. Its totient is φ = 9175040.

The previous prime is 25036229. The next prime is 25036241. The reversal of 25036240 is 4263052.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 553536 + 24482704 = 744^2 + 4948^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25036241) 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, 55536 + ... + 55984.

It is an arithmetic number, because the mean of its divisors is an integer number (790965).

Almost surely, 2^25036240 is an apocalyptic number.

25036240 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 25036240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31638600).

25036240 is an abundant number, since it is smaller than the sum of its proper divisors (38240960).

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

25036240 is a wasteful number, since it uses less digits than its factorization.

25036240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25036240 is about 5003.6226876134. The cubic root of 25036240 is about 292.5429941427.

Adding to 25036240 its reverse (4263052), we get a palindrome (29299292).

The spelling of 25036240 in words is "twenty-five million, thirty-six thousand, two hundred forty".