25989385 has 4 divisors (see below), whose sum is σ = 31187268. Its totient is φ = 20791504.

The previous prime is 25989349. The next prime is 25989391. The reversal of 25989385 is 58398952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17007376 + 8982009 = 4124^2 + 2997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25989385 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2598934 + ... + 2598943.

It is an arithmetic number, because the mean of its divisors is an integer number (7796817).

Almost surely, 2^25989385 is an apocalyptic number.

It is an amenable number.

25989385 is a deficient number, since it is larger than the sum of its proper divisors (5197883).

25989385 is an equidigital number, since it uses as much as digits as its factorization.

25989385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197882.

The product of its digits is 777600, while the sum is 49.

The square root of 25989385 is about 5097.9785209434. The cubic root of 25989385 is about 296.2092848198.

The spelling of 25989385 in words is "twenty-five million, nine hundred eighty-nine thousand, three hundred eighty-five".