25987887 has 12 divisors (see below), whose sum is σ = 37757304. Its totient is φ = 17224080.

The previous prime is 25987879. The next prime is 25987901. The reversal of 25987887 is 78878952.

It is not a de Polignac number, because 25987887 - 2³ = 25987879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25987807) 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 11 ways as a sum of consecutive naturals, for example, 6789 + ... + 9902.

It is an arithmetic number, because the mean of its divisors is an integer number (3146442).

Almost surely, 2^25987887 is an apocalyptic number.

25987887 is a deficient number, since it is larger than the sum of its proper divisors (11769417).

25987887 is a wasteful number, since it uses less digits than its factorization.

25987887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16870 (or 16867 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 25987887 is about 5097.8315978463. The cubic root of 25987887 is about 296.2035936497.

The spelling of 25987887 in words is "twenty-five million, nine hundred eighty-seven thousand, eight hundred eighty-seven".