25632540 has 36 divisors (see below), whose sum is σ = 77752584. Its totient is φ = 6835296.

The previous prime is 25632533. The next prime is 25632553. The reversal of 25632540 is 4523652.

25632540 is a `hidden beast` number, since 25 + 632 + 5 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71022 + ... + 71381.

It is an arithmetic number, because the mean of its divisors is an integer number (2159794).

Almost surely, 2^25632540 is an apocalyptic number.

25632540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25632540 is an abundant number, since it is smaller than the sum of its proper divisors (52120044).

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

25632540 is a wasteful number, since it uses less digits than its factorization.

25632540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142418 (or 142413 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25632540 is about 5062.8588761687. The cubic root of 25632540 is about 294.8473403377.

The spelling of 25632540 in words is "twenty-five million, six hundred thirty-two thousand, five hundred forty".