25438 has 16 divisors (see below), whose sum is σ = 46080. Its totient is φ = 10296.

The previous prime is 25423. The next prime is 25439. The reversal of 25438 is 83452.

It is a d-powerful number, because it can be written as 2¹³ + 5³ + 4⁷ + 3⁶ + 8 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25439) 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, 283 + ... + 361.

It is an arithmetic number, because the mean of its divisors is an integer number (2880).

2²⁵⁴³⁸ is an apocalyptic number.

25438 is a deficient number, since it is larger than the sum of its proper divisors (20642).

25438 is a wasteful number, since it uses less digits than its factorization.

25438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its digits is 960, while the sum is 22.

The square root of 25438 is about 159.4929465525. The cubic root of 25438 is about 29.4099523589.

It can be divided in two parts, 254 and 38, that added together give a palindrome (292).

The spelling of 25438 in words is "twenty-five thousand, four hundred thirty-eight".