25836 has 12 divisors (see below), whose sum is σ = 60312. Its totient is φ = 8608.

The previous prime is 25819. The next prime is 25841. The reversal of 25836 is 63852.

25836 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between even and odd.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25836.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (5026).

2²⁵⁸³⁶ is an apocalyptic number.

It is an amenable number.

25836 is an abundant number, since it is smaller than the sum of its proper divisors (34476).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30156).

25836 is a wasteful number, since it uses less digits than its factorization.

25836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160 (or 2158 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 25836 is about 160.7358080827. The cubic root of 25836 is about 29.5625408790.

It can be divided in two parts, 25 and 836, that added together give a triangular number (861 = T₄₁).

The spelling of 25836 in words is "twenty-five thousand, eight hundred thirty-six".