25838538 has 32 divisors (see below), whose sum is σ = 59693760. Its totient is φ = 7368960.

The previous prime is 25838513. The next prime is 25838551. The reversal of 25838538 is 83583852.

It is a self number, because there is not a number n which added to its sum of digits gives 25838538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10393 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (1865430).

Almost surely, 2^25838538 is an apocalyptic number.

25838538 is an abundant number, since it is smaller than the sum of its proper divisors (33855222).

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

25838538 is a wasteful number, since it uses less digits than its factorization.

25838538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23062.

The product of its digits is 230400, while the sum is 42.

The square root of 25838538 is about 5083.1622047698. The cubic root of 25838538 is about 295.6350887292.

The spelling of 25838538 in words is "twenty-five million, eight hundred thirty-eight thousand, five hundred thirty-eight".