25025840 has 160 divisors (see below), whose sum is σ = 72852480. Its totient is φ = 7805952.

The previous prime is 25025839. The next prime is 25025843. The reversal of 25025840 is 4852052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373487 + ... + 373553.

It is an arithmetic number, because the mean of its divisors is an integer number (455328).

Almost surely, 2^25025840 is an apocalyptic number.

25025840 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 25025840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36426240).

25025840 is an abundant number, since it is smaller than the sum of its proper divisors (47826640).

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

25025840 is a wasteful number, since it uses less digits than its factorization.

25025840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 25025840 is about 5002.5833326392. The cubic root of 25025840 is about 292.5024812900.

Adding to 25025840 its reverse (4852052), we get a palindrome (29877892).

The spelling of 25025840 in words is "twenty-five million, twenty-five thousand, eight hundred forty".