25800450 has 96 divisors (see below), whose sum is σ = 70120512. Its totient is φ = 6240000.

The previous prime is 25800449. The next prime is 25800493. The reversal of 25800450 is 5400852.

It is a self number, because there is not a number n which added to its sum of digits gives 25800450.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 196885 + ... + 197015.

It is an arithmetic number, because the mean of its divisors is an integer number (730422).

Almost surely, 2^25800450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25800450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35060256).

25800450 is an abundant number, since it is smaller than the sum of its proper divisors (44320062).

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

25800450 is a wasteful number, since it uses less digits than its factorization.

25800450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 25800450 is about 5079.4143363187. The cubic root of 25800450 is about 295.4897543122.

The spelling of 25800450 in words is "twenty-five million, eight hundred thousand, four hundred fifty".