25989800 has 48 divisors (see below), whose sum is σ = 62523900. Its totient is φ = 10035200.

The previous prime is 25989791. The next prime is 25989809. The reversal of 25989800 is 898952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25989791) and next prime (25989809).

It can be written as a sum of positive squares in 6 ways, for example, as 13557124 + 12432676 = 3682^2 + 3526^2 .

It is not an unprimeable number, because it can be changed into a prime (25989809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3560 + ... + 8040.

Almost surely, 2^25989800 is an apocalyptic number.

25989800 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 25989800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31261950).

25989800 is an abundant number, since it is smaller than the sum of its proper divisors (36534100).

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

25989800 is a wasteful number, since it uses less digits than its factorization.

25989800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526 (or 4517 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 25989800 is about 5098.0192231886. The cubic root of 25989800 is about 296.2108614404.

The spelling of 25989800 in words is "twenty-five million, nine hundred eighty-nine thousand, eight hundred".