25881366 has 16 divisors (see below), whose sum is σ = 59157504. Its totient is φ = 7394664.

The previous prime is 25881341. The next prime is 25881367. The reversal of 25881366 is 66318852.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25881367) 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 7 ways as a sum of consecutive naturals, for example, 308070 + ... + 308153.

It is an arithmetic number, because the mean of its divisors is an integer number (3697344).

Almost surely, 2^25881366 is an apocalyptic number.

25881366 is an abundant number, since it is smaller than the sum of its proper divisors (33276138).

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

25881366 is a wasteful number, since it uses less digits than its factorization.

25881366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616235.

The product of its digits is 69120, while the sum is 39.

The square root of 25881366 is about 5087.3731925228. The cubic root of 25881366 is about 295.7983393287.

The spelling of 25881366 in words is "twenty-five million, eight hundred eighty-one thousand, three hundred sixty-six".