25328891 has 16 divisors (see below), whose sum is σ = 30117888. Its totient is φ = 20844000.

The previous prime is 25328869. The next prime is 25328903. The reversal of 25328891 is 19882352.

It is a cyclic number.

It is not a de Polignac number, because 25328891 - 2¹⁰ = 25327867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25328801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32381 + ... + 33153.

It is an arithmetic number, because the mean of its divisors is an integer number (1882368).

Almost surely, 2^25328891 is an apocalyptic number.

25328891 is a deficient number, since it is larger than the sum of its proper divisors (4788997).

25328891 is a wasteful number, since it uses less digits than its factorization.

25328891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962.

The product of its digits is 34560, while the sum is 38.

The square root of 25328891 is about 5032.7816364313. The cubic root of 25328891 is about 293.6784358035.

The spelling of 25328891 in words is "twenty-five million, three hundred twenty-eight thousand, eight hundred ninety-one".