25616320 has 28 divisors (see below), whose sum is σ = 60999624. Its totient is φ = 10246400.

The previous prime is 25616291. The next prime is 25616329. The reversal of 25616320 is 2361652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25616329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39706 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (2178558).

Almost surely, 2^25616320 is an apocalyptic number.

25616320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25616320 is an abundant number, since it is smaller than the sum of its proper divisors (35383304).

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

25616320 is an equidigital number, since it uses as much as digits as its factorization.

25616320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80068 (or 80058 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25616320 is about 5061.2567609241. The cubic root of 25616320 is about 294.7851351229.

Adding to 25616320 its reverse (2361652), we get a palindrome (27977972).

The spelling of 25616320 in words is "twenty-five million, six hundred sixteen thousand, three hundred twenty".