25828 has 12 divisors (see below), whose sum is σ = 49392. Its totient is φ = 11720.

The previous prime is 25819. The next prime is 25841. The reversal of 25828 is 82852.

It is a plaindrome in base 15.

It is an unprimeable number.

25828 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 250 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (4116).

2²⁵⁸²⁸ is an apocalyptic number.

It is an amenable number.

25828 is a deficient number, since it is larger than the sum of its proper divisors (23564).

25828 is a wasteful number, since it uses less digits than its factorization.

25828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 600 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 25828 is about 160.7109205997. The cubic root of 25828 is about 29.5594892619.

The spelling of 25828 in words is "twenty-five thousand, eight hundred twenty-eight".