25231840 has 48 divisors (see below), whose sum is σ = 60011280. Its totient is φ = 10024960.

The previous prime is 25231837. The next prime is 25231847. The reversal of 25231840 is 4813252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28200 + ... + 29080.

It is an arithmetic number, because the mean of its divisors is an integer number (1250235).

Almost surely, 2^25231840 is an apocalyptic number.

25231840 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 25231840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30005640).

25231840 is an abundant number, since it is smaller than the sum of its proper divisors (34779440).

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

25231840 is a wasteful number, since it uses less digits than its factorization.

25231840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 25231840 is about 5023.1304980062. The cubic root of 25231840 is about 293.3028664408.

The spelling of 25231840 in words is "twenty-five million, two hundred thirty-one thousand, eight hundred forty".