25890000 has 100 divisors (see below), whose sum is σ = 83673216. Its totient is φ = 6896000.

The previous prime is 25889993. The next prime is 25890043. The reversal of 25890000 is 9852.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29569 + ... + 30431.

Almost surely, 2^25890000 is an apocalyptic number.

25890000 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 25890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41836608).

25890000 is an abundant number, since it is smaller than the sum of its proper divisors (57783216).

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

25890000 is an equidigital number, since it uses as much as digits as its factorization.

25890000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 25890000 is about 5088.2216932834. The cubic root of 25890000 is about 295.8312283568.

Adding to 25890000 its reverse (9852), we get a palindrome (25899852).

The spelling of 25890000 in words is "twenty-five million, eight hundred ninety thousand".