25884391 has 4 divisors (see below), whose sum is σ = 27875512. Its totient is φ = 23893272.

The previous prime is 25884377. The next prime is 25884427. The reversal of 25884391 is 19348852.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25884391 - 2⁵ = 25884359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25884371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995541 + ... + 995566.

It is an arithmetic number, because the mean of its divisors is an integer number (6968878).

Almost surely, 2^25884391 is an apocalyptic number.

25884391 is a deficient number, since it is larger than the sum of its proper divisors (1991121).

25884391 is a wasteful number, since it uses less digits than its factorization.

25884391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991120.

The product of its digits is 69120, while the sum is 40.

The square root of 25884391 is about 5087.6704885438. The cubic root of 25884391 is about 295.8098631295.

The spelling of 25884391 in words is "twenty-five million, eight hundred eighty-four thousand, three hundred ninety-one".