25808928 has 24 divisors (see below), whose sum is σ = 67748688. Its totient is φ = 8602944.

The previous prime is 25808903. The next prime is 25808929. The reversal of 25808928 is 82980852.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×25808928² = 1332201529018368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25808928.

It is not an unprimeable number, because it can be changed into a prime (25808929) 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, 134326 + ... + 134517.

It is an arithmetic number, because the mean of its divisors is an integer number (2822862).

Almost surely, 2^25808928 is an apocalyptic number.

It is an amenable number.

25808928 is an abundant number, since it is smaller than the sum of its proper divisors (41939760).

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

25808928 is a wasteful number, since it uses less digits than its factorization.

25808928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268856 (or 268848 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 25808928 is about 5080.2488128043. The cubic root of 25808928 is about 295.5221166391.

The spelling of 25808928 in words is "twenty-five million, eight hundred eight thousand, nine hundred twenty-eight".