25580416 has 32 divisors (see below), whose sum is σ = 53182800. Its totient is φ = 12232704.

The previous prime is 25580333. The next prime is 25580419. The reversal of 25580416 is 61408552.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25580419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401 + ... + 7288.

Almost surely, 2^25580416 is an apocalyptic number.

It is an amenable number.

25580416 is an abundant number, since it is smaller than the sum of its proper divisors (27602384).

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

25580416 is an equidigital number, since it uses as much as digits as its factorization.

25580416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8726 (or 8714 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 25580416 is about 5057.7085720710. The cubic root of 25580416 is about 294.6473464762.

Adding to 25580416 its reverse (61408552), we get a palindrome (86988968).

The spelling of 25580416 in words is "twenty-five million, five hundred eighty thousand, four hundred sixteen".