25720560 has 120 divisors (see below), whose sum is σ = 87338160. Its totient is φ = 6782976.

The previous prime is 25720549. The next prime is 25720561. The reversal of 25720560 is 6502752.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99952 + ... + 100208.

It is an arithmetic number, because the mean of its divisors is an integer number (727818).

Almost surely, 2^25720560 is an apocalyptic number.

25720560 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 25720560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43669080).

25720560 is an abundant number, since it is smaller than the sum of its proper divisors (61617600).

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

25720560 is a wasteful number, since it uses less digits than its factorization.

25720560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 25720560 is about 5071.5441435523. The cubic root of 25720560 is about 295.1844484724.

The spelling of 25720560 in words is "twenty-five million, seven hundred twenty thousand, five hundred sixty".