25840128 has 40 divisors (see below), whose sum is σ = 68843808. Its totient is φ = 8612864.

The previous prime is 25840117. The next prime is 25840163. The reversal of 25840128 is 82104852.

It is a junction number, because it is equal to n+sod(n) for n = 25840095 and 25840104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6876 + ... + 9947.

Almost surely, 2^25840128 is an apocalyptic number.

It is an amenable number.

25840128 is an abundant number, since it is smaller than the sum of its proper divisors (43003680).

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

25840128 is an equidigital number, since it uses as much as digits as its factorization.

25840128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16844 (or 16828 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 25840128 is about 5083.3186010715. The cubic root of 25840128 is about 295.6411526707.

The spelling of 25840128 in words is "twenty-five million, eight hundred forty thousand, one hundred twenty-eight".