25806828 has 24 divisors (see below), whose sum is σ = 62834688. Its totient is φ = 8228176.

The previous prime is 25806821. The next prime is 25806829. The reversal of 25806828 is 82860852.

It is not an unprimeable number, because it can be changed into a prime (25806821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46476 + ... + 47027.

It is an arithmetic number, because the mean of its divisors is an integer number (2618112).

Almost surely, 2^25806828 is an apocalyptic number.

It is an amenable number.

25806828 is an abundant number, since it is smaller than the sum of its proper divisors (37027860).

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

25806828 is a wasteful number, since it uses less digits than its factorization.

25806828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93533 (or 93531 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 25806828 is about 5080.0421258096. The cubic root of 25806828 is about 295.5141011534.

The spelling of 25806828 in words is "twenty-five million, eight hundred six thousand, eight hundred twenty-eight".