25856920 has 16 divisors (see below), whose sum is σ = 58178160. Its totient is φ = 10342752.

The previous prime is 25856879. The next prime is 25856921. The reversal of 25856920 is 2965852.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25856920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25856921) 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, 323172 + ... + 323251.

It is an arithmetic number, because the mean of its divisors is an integer number (3636135).

Almost surely, 2^25856920 is an apocalyptic number.

25856920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25856920 is an abundant number, since it is smaller than the sum of its proper divisors (32321240).

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

25856920 is a wasteful number, since it uses less digits than its factorization.

25856920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646434 (or 646430 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 25856920 is about 5084.9700097444. The cubic root of 25856920 is about 295.7051788147.

The spelling of 25856920 in words is "twenty-five million, eight hundred fifty-six thousand, nine hundred twenty".