25844 has 24 divisors (see below), whose sum is σ = 56448. Its totient is φ = 10080.

The previous prime is 25841. The next prime is 25847. The reversal of 25844 is 44852.

It is an interprime number because it is at equal distance from previous prime (25841) and next prime (25847).

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25844.

It is not an unprimeable number, because it can be changed into a prime (25841) 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, 329 + ... + 399.

It is an arithmetic number, because the mean of its divisors is an integer number (2352).

2²⁵⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224).

25844 is an abundant number, since it is smaller than the sum of its proper divisors (30604).

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

25844 is a wasteful number, since it uses less digits than its factorization.

25844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 93 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 25844 is about 160.7606917129. The cubic root of 25844 is about 29.5655918663.

The spelling of 25844 in words is "twenty-five thousand, eight hundred forty-four".