25782863 has 4 divisors (see below), whose sum is σ = 27299520. Its totient is φ = 24266208.

The previous prime is 25782853. The next prime is 25782877. The reversal of 25782863 is 36828752.

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

It is not a de Polignac number, because 25782863 - 2¹⁰ = 25781839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25782863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25782853) 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, 758303 + ... + 758336.

It is an arithmetic number, because the mean of its divisors is an integer number (6824880).

Almost surely, 2^25782863 is an apocalyptic number.

25782863 is a deficient number, since it is larger than the sum of its proper divisors (1516657).

25782863 is a wasteful number, since it uses less digits than its factorization.

25782863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516656.

The product of its digits is 161280, while the sum is 41.

The square root of 25782863 is about 5077.6828376731. The cubic root of 25782863 is about 295.4225983833.

The spelling of 25782863 in words is "twenty-five million, seven hundred eighty-two thousand, eight hundred sixty-three".