25648138 has 16 divisors (see below), whose sum is σ = 42880320. Its totient is φ = 11434176.

The previous prime is 25648123. The next prime is 25648163. The reversal of 25648138 is 83184652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25648097 and 25648106.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19206 + ... + 20497.

It is an arithmetic number, because the mean of its divisors is an integer number (2680020).

Almost surely, 2^25648138 is an apocalyptic number.

25648138 is a deficient number, since it is larger than the sum of its proper divisors (17232182).

25648138 is a wasteful number, since it uses less digits than its factorization.

25648138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39741.

The product of its digits is 46080, while the sum is 37.

The square root of 25648138 is about 5064.3990759023. The cubic root of 25648138 is about 294.9071353776.

The spelling of 25648138 in words is "twenty-five million, six hundred forty-eight thousand, one hundred thirty-eight".