25889887 has 4 divisors (see below), whose sum is σ = 25903800. Its totient is φ = 25875976.

The previous prime is 25889879. The next prime is 25889909. The reversal of 25889887 is 78898852.

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

It is a cyclic number.

It is not a de Polignac number, because 25889887 - 2³ = 25889879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25889807) 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 3 ways as a sum of consecutive naturals, for example, 3637 + ... + 8062.

It is an arithmetic number, because the mean of its divisors is an integer number (6475950).

Almost surely, 2^25889887 is an apocalyptic number.

25889887 is a deficient number, since it is larger than the sum of its proper divisors (13913).

25889887 is a wasteful number, since it uses less digits than its factorization.

25889887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13912.

The product of its digits is 2580480, while the sum is 55.

The square root of 25889887 is about 5088.2105891954. The cubic root of 25889887 is about 295.8307979593.

The spelling of 25889887 in words is "twenty-five million, eight hundred eighty-nine thousand, eight hundred eighty-seven".