25632636 has 48 divisors (see below), whose sum is σ = 62781600. Its totient is φ = 8128512.

The previous prime is 25632631. The next prime is 25632661. The reversal of 25632636 is 63623652.

It is a junction number, because it is equal to n+sod(n) for n = 25632597 and 25632606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25632631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24900 + ... + 25908.

It is an arithmetic number, because the mean of its divisors is an integer number (1307950).

Almost surely, 2^25632636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25632636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31390800).

25632636 is an abundant number, since it is smaller than the sum of its proper divisors (37148964).

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

25632636 is a wasteful number, since it uses less digits than its factorization.

25632636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1116 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

The square root of 25632636 is about 5062.8683569692. The cubic root of 25632636 is about 294.8477084285.

The spelling of 25632636 in words is "twenty-five million, six hundred thirty-two thousand, six hundred thirty-six".