25327640 has 64 divisors (see below), whose sum is σ = 62596800. Its totient is φ = 9165312.

The previous prime is 25327613. The next prime is 25327661. The reversal of 25327640 is 4672352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27101 + ... + 28019.

It is an arithmetic number, because the mean of its divisors is an integer number (978075).

Almost surely, 2^25327640 is an apocalyptic number.

25327640 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 25327640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31298400).

25327640 is an abundant number, since it is smaller than the sum of its proper divisors (37269160).

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

25327640 is a wasteful number, since it uses less digits than its factorization.

25327640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 25327640 is about 5032.6573497507. The cubic root of 25327640 is about 293.6736007744.

Adding to 25327640 its reverse (4672352), we get a palindrome (29999992).

The spelling of 25327640 in words is "twenty-five million, three hundred twenty-seven thousand, six hundred forty".