25921992 has 16 divisors (see below), whose sum is σ = 64805040. Its totient is φ = 8640656.

The previous prime is 25921967. The next prime is 25921997. The reversal of 25921992 is 29912952.

It is a self number, because there is not a number n which added to its sum of digits gives 25921992.

It is not an unprimeable number, because it can be changed into a prime (25921997) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 540018 + ... + 540065.

It is an arithmetic number, because the mean of its divisors is an integer number (4050315).

Almost surely, 2^25921992 is an apocalyptic number.

It is an amenable number.

25921992 is an abundant number, since it is smaller than the sum of its proper divisors (38883048).

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

25921992 is a wasteful number, since it uses less digits than its factorization.

25921992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080092 (or 1080088 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 25921992 is about 5091.3644536607. The cubic root of 25921992 is about 295.9530300441.

The spelling of 25921992 in words is "twenty-five million, nine hundred twenty-one thousand, nine hundred ninety-two".