25869900 has 144 divisors (see below), whose sum is σ = 87105536. Its totient is φ = 5806080.

The previous prime is 25869889. The next prime is 25869923. The reversal of 25869900 is 996852.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203637 + ... + 203763.

Almost surely, 2^25869900 is an apocalyptic number.

25869900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25869900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43552768).

25869900 is an abundant number, since it is smaller than the sum of its proper divisors (61235636).

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

25869900 is a wasteful number, since it uses less digits than its factorization.

25869900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 25869900 is about 5086.2461599887. The cubic root of 25869900 is about 295.7546512079.

The spelling of 25869900 in words is "twenty-five million, eight hundred sixty-nine thousand, nine hundred".