25838 has 4 divisors (see below), whose sum is σ = 38760. Its totient is φ = 12918.

The previous prime is 25819. The next prime is 25841. The reversal of 25838 is 83852.

It is a semiprime because it is the product of two primes.

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

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 25838.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (9690).

2²⁵⁸³⁸ is an apocalyptic number.

25838 is a deficient number, since it is larger than the sum of its proper divisors (12922).

25838 is a wasteful number, since it uses less digits than its factorization.

25838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12921.

The product of its digits is 1920, while the sum is 26.

The square root of 25838 is about 160.7420293514. The cubic root of 25838 is about 29.5633036849.

The spelling of 25838 in words is "twenty-five thousand, eight hundred thirty-eight".