25689738 has 16 divisors (see below), whose sum is σ = 51469920. Its totient is φ = 8548176.

The previous prime is 25689733. The next prime is 25689749. The reversal of 25689738 is 83798652.

It is not an unprimeable number, because it can be changed into a prime (25689733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 7172.

It is an arithmetic number, because the mean of its divisors is an integer number (3216870).

Almost surely, 2^25689738 is an apocalyptic number.

25689738 is an abundant number, since it is smaller than the sum of its proper divisors (25780182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25689738 is a wasteful number, since it uses less digits than its factorization.

25689738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7541.

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

The square root of 25689738 is about 5068.5045131676. The cubic root of 25689738 is about 295.0664908057.

The spelling of 25689738 in words is "twenty-five million, six hundred eighty-nine thousand, seven hundred thirty-eight".