25540416 has 168 divisors, whose sum is σ = 83210400. Its totient is φ = 7418880.

The previous prime is 25540399. The next prime is 25540421. The reversal of 25540416 is 61404552.

25540416 is a `hidden beast` number, since 255 + 404 + 1 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25540416.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183675 + ... + 183813.

It is an arithmetic number, because the mean of its divisors is an integer number (495300).

Almost surely, 2^25540416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25540416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41605200).

25540416 is an abundant number, since it is smaller than the sum of its proper divisors (57669984).

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

25540416 is a wasteful number, since it uses less digits than its factorization.

25540416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25540416 is about 5053.7526650995. The cubic root of 25540416 is about 294.4936867079.

Adding to 25540416 its reverse (61404552), we get a palindrome (86944968).

The spelling of 25540416 in words is "twenty-five million, five hundred forty thousand, four hundred sixteen".