25864560 has 60 divisors (see below), whose sum is σ = 86864232. Its totient is φ = 6897024.

The previous prime is 25864547. The next prime is 25864561. The reversal of 25864560 is 6546852.

25864560 is a `hidden beast` number, since 2 + 5 + 8 + 645 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25864561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17242 + ... + 18681.

Almost surely, 2^25864560 is an apocalyptic number.

25864560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25864560 is an abundant number, since it is smaller than the sum of its proper divisors (60999672).

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

25864560 is a wasteful number, since it uses less digits than its factorization.

25864560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35942 (or 35933 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 25864560 is about 5085.7211877963. The cubic root of 25864560 is about 295.7343001626.

The spelling of 25864560 in words is "twenty-five million, eight hundred sixty-four thousand, five hundred sixty".