25798439 has 8 divisors (see below), whose sum is σ = 26360640. Its totient is φ = 25239136.

The previous prime is 25798427. The next prime is 25798511. The reversal of 25798439 is 93489752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25798439 - 2⁸ = 25798183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25798393 and 25798402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25798039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35522 + ... + 36240.

It is an arithmetic number, because the mean of its divisors is an integer number (3295080).

Almost surely, 2^25798439 is an apocalyptic number.

25798439 is a deficient number, since it is larger than the sum of its proper divisors (562201).

25798439 is an equidigital number, since it uses as much as digits as its factorization.

25798439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449.

The product of its digits is 544320, while the sum is 47.

The square root of 25798439 is about 5079.2163765683. The cubic root of 25798439 is about 295.4820768578.

The spelling of 25798439 in words is "twenty-five million, seven hundred ninety-eight thousand, four hundred thirty-nine".