25838865 has 32 divisors (see below), whose sum is σ = 49472640. Its totient is φ = 12719808.

The previous prime is 25838863. The next prime is 25838887. The reversal of 25838865 is 56883852.

It is a happy number.

25838865 is a `hidden beast` number, since 2 + 583 + 8 + 8 + 65 = 666.

It is not a de Polignac number, because 25838865 - 2¹ = 25838863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25838865.

It is not an unprimeable number, because it can be changed into a prime (25838863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5607 + ... + 9116.

It is an arithmetic number, because the mean of its divisors is an integer number (1546020).

Almost surely, 2^25838865 is an apocalyptic number.

It is an amenable number.

25838865 is a deficient number, since it is larger than the sum of its proper divisors (23633775).

25838865 is a wasteful number, since it uses less digits than its factorization.

25838865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14750 (or 14744 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 25838865 is about 5083.1943696853. The cubic root of 25838865 is about 295.6363358621.

The spelling of 25838865 in words is "twenty-five million, eight hundred thirty-eight thousand, eight hundred sixty-five".