25987863 has 16 divisors (see below), whose sum is σ = 37950336. Its totient is φ = 15687840.

The previous prime is 25987859. The next prime is 25987873. The reversal of 25987863 is 36878952.

It is not a de Polignac number, because 25987863 - 2² = 25987859 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25987823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7720 + ... + 10562.

It is an arithmetic number, because the mean of its divisors is an integer number (2371896).

Almost surely, 2^25987863 is an apocalyptic number.

25987863 is a deficient number, since it is larger than the sum of its proper divisors (11962473).

25987863 is a wasteful number, since it uses less digits than its factorization.

25987863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134.

The product of its digits is 725760, while the sum is 48.

The square root of 25987863 is about 5097.8292439037. The cubic root of 25987863 is about 296.2035024676.

The spelling of 25987863 in words is "twenty-five million, nine hundred eighty-seven thousand, eight hundred sixty-three".