25688680 has 16 divisors (see below), whose sum is σ = 57799620. Its totient is φ = 10275456.

The previous prime is 25688669. The next prime is 25688681. The reversal of 25688680 is 8688652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23677956 + 2010724 = 4866^2 + 1418^2 .

It is not an unprimeable number, because it can be changed into a prime (25688681) 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, 321069 + ... + 321148.

Almost surely, 2^25688680 is an apocalyptic number.

25688680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25688680 is an abundant number, since it is smaller than the sum of its proper divisors (32110940).

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

25688680 is a wasteful number, since it uses less digits than its factorization.

25688680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642228 (or 642224 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 25688680 is about 5068.4001420567. The cubic root of 25688680 is about 295.0624401009.

The spelling of 25688680 in words is "twenty-five million, six hundred eighty-eight thousand, six hundred eighty".