636880216 has 16 divisors (see below), whose sum is σ = 1364743440. Its totient is φ = 272948640.

The previous prime is 636880207. The next prime is 636880217. The reversal of 636880216 is 612088636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636880217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5686375 + ... + 5686486.

It is an arithmetic number, because the mean of its divisors is an integer number (85296465).

Almost surely, 2^636880216 is an apocalyptic number.

It is an amenable number.

636880216 is an abundant number, since it is smaller than the sum of its proper divisors (727863224).

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

636880216 is a wasteful number, since it uses less digits than its factorization.

636880216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11372874 (or 11372870 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 636880216 is about 25236.4858092406. The cubic root of 636880216 is about 860.3713089253.

The spelling of 636880216 in words is "six hundred thirty-six million, eight hundred eighty thousand, two hundred sixteen".