25813140 has 48 divisors (see below), whose sum is σ = 76531392. Its totient is φ = 6478336.

The previous prime is 25813133. The next prime is 25813159. The reversal of 25813140 is 4131852.

It is a self number, because there is not a number n which added to its sum of digits gives 25813140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11634 + ... + 13673.

It is an arithmetic number, because the mean of its divisors is an integer number (1594404).

Almost surely, 2^25813140 is an apocalyptic number.

25813140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25813140 is an abundant number, since it is smaller than the sum of its proper divisors (50718252).

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

25813140 is a wasteful number, since it uses less digits than its factorization.

25813140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25336 (or 25334 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 25813140 is about 5080.6633425174. The cubic root of 25813140 is about 295.5381921027.

Adding to 25813140 its reverse (4131852), we get a palindrome (29944992).

The spelling of 25813140 in words is "twenty-five million, eight hundred thirteen thousand, one hundred forty".