25836889 has 27 divisors (see below), whose sum is σ = 31068093. Its totient is φ = 21470592.

The previous prime is 25836859. The next prime is 25836901. The reversal of 25836889 is 98863852.

25836889 = 132² + 133² + ... + 430².

The square root of 25836889 is 5083.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 233289 + 25603600 = 483^2 + 5060^2 .

It is not a de Polignac number, because 25836889 - 2¹⁷ = 25705817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25836859) 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 26 ways as a sum of consecutive naturals, for example, 1123332 + ... + 1123354.

Almost surely, 2^25836889 is an apocalyptic number.

25836889 is the 5083-rd square number.

25836889 is the 2542-nd centered octagonal number.

It is an amenable number.

25836889 is a deficient number, since it is larger than the sum of its proper divisors (5231204).

25836889 is a wasteful number, since it uses less digits than its factorization.

25836889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 53 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The cubic root of 25836889 is about 295.6287995108.

Multiplying 25836889 by its sum of digits (49), we get a square (1266007561 = 35581²).

The spelling of 25836889 in words is "twenty-five million, eight hundred thirty-six thousand, eight hundred eighty-nine".