25840900 has 36 divisors (see below), whose sum is σ = 56801920. Its totient is φ = 10202400.

The previous prime is 25840877. The next prime is 25840909. The reversal of 25840900 is 904852.

It is a happy number.

It is a super-2 number, since 2×25840900² = 1335504225620000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840909) 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, 6265 + ... + 9535.

Almost surely, 2^25840900 is an apocalyptic number.

25840900 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 25840900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28400960).

25840900 is an abundant number, since it is smaller than the sum of its proper divisors (30961020).

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

25840900 is a wasteful number, since it uses less digits than its factorization.

25840900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 25840900 is about 5083.3945351507. The cubic root of 25840900 is about 295.6440968344.

The spelling of 25840900 in words is "twenty-five million, eight hundred forty thousand, nine hundred".