25005720 has 64 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 6627200.

The previous prime is 25005713. The next prime is 25005731. The reversal of 25005720 is 2750052.

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, 22375 + ... + 23465.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^25005720 is an apocalyptic number.

25005720 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 25005720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37739520).

25005720 is an abundant number, since it is smaller than the sum of its proper divisors (50473320).

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

25005720 is a wasteful number, since it uses less digits than its factorization.

25005720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 25005720 is about 5000.5719672853. The cubic root of 25005720 is about 292.4240726293.

Adding to 25005720 its reverse (2750052), we get a palindrome (27755772).

The spelling of 25005720 in words is "twenty-five million, five thousand, seven hundred twenty".