636889652 has 36 divisors (see below), whose sum is σ = 1364771520. Its totient is φ = 258585264.

The previous prime is 636889597. The next prime is 636889679. The reversal of 636889652 is 256988636.

636889652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×636889652² = 811256857649362208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636889594 and 636889603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81788 + ... + 89235.

It is an arithmetic number, because the mean of its divisors is an integer number (37910320).

Almost surely, 2^636889652 is an apocalyptic number.

It is an amenable number.

636889652 is an abundant number, since it is smaller than the sum of its proper divisors (727881868).

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

636889652 is a wasteful number, since it uses less digits than its factorization.

636889652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171060 (or 171051 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The square root of 636889652 is about 25236.6727600926. The cubic root of 636889652 is about 860.3755579836.

The spelling of 636889652 in words is "six hundred thirty-six million, eight hundred eighty-nine thousand, six hundred fifty-two".