25384864 has 24 divisors (see below), whose sum is σ = 50141700. Its totient is φ = 12650496.

The previous prime is 25384861. The next prime is 25384871. The reversal of 25384864 is 46848352.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 2917264 = 4740^2 + 1708^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25384861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10032 + ... + 12304.

Almost surely, 2^25384864 is an apocalyptic number.

It is an amenable number.

25384864 is a deficient number, since it is larger than the sum of its proper divisors (24756836).

25384864 is a wasteful number, since it uses less digits than its factorization.

25384864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2624 counting only the distinct ones).

The product of its digits is 184320, while the sum is 40.

The square root of 25384864 is about 5038.3394089720. The cubic root of 25384864 is about 293.8946048861.

The spelling of 25384864 in words is "twenty-five million, three hundred eighty-four thousand, eight hundred sixty-four".