25867856 has 40 divisors (see below), whose sum is σ = 58103424. Its totient is φ = 10926720.

The previous prime is 25867841. The next prime is 25867859. The reversal of 25867856 is 65876852.

It is a self number, because there is not a number n which added to its sum of digits gives 25867856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25867859) 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 7 ways as a sum of consecutive naturals, for example, 6326 + ... + 9578.

Almost surely, 2^25867856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25867856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29051712).

25867856 is an abundant number, since it is smaller than the sum of its proper divisors (32235568).

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

25867856 is a wasteful number, since it uses less digits than its factorization.

25867856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339 (or 3333 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 25867856 is about 5086.0452219775. The cubic root of 25867856 is about 295.7468617379.

The spelling of 25867856 in words is "twenty-five million, eight hundred sixty-seven thousand, eight hundred fifty-six".