25831120 has 80 divisors (see below), whose sum is σ = 69281280. Its totient is φ = 8773632.

The previous prime is 25831097. The next prime is 25831129. The reversal of 25831120 is 2113852.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 25831091 and 25831100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25831129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107961 + ... + 108199.

It is an arithmetic number, because the mean of its divisors is an integer number (866016).

Almost surely, 2^25831120 is an apocalyptic number.

25831120 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 25831120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34640640).

25831120 is an abundant number, since it is smaller than the sum of its proper divisors (43450160).

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

25831120 is a wasteful number, since it uses less digits than its factorization.

25831120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 25831120 is about 5082.4324884842. The cubic root of 25831120 is about 295.6067946750.

Adding to 25831120 its reverse (2113852), we get a palindrome (27944972).

The spelling of 25831120 in words is "twenty-five million, eight hundred thirty-one thousand, one hundred twenty".