636431052 has 48 divisors (see below), whose sum is σ = 1506879360. Its totient is φ = 209033088.

The previous prime is 636431041. The next prime is 636431083. The reversal of 636431052 is 250134636.

It is a super-3 number, since 3×636431052³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566163 + ... + 567285.

It is an arithmetic number, because the mean of its divisors is an integer number (31393320).

Almost surely, 2^636431052 is an apocalyptic number.

It is an amenable number.

636431052 is an abundant number, since it is smaller than the sum of its proper divisors (870448308).

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

636431052 is a wasteful number, since it uses less digits than its factorization.

636431052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 636431052 is about 25227.5851400803. The cubic root of 636431052 is about 860.1690004991.

Adding to 636431052 its reverse (250134636), we get a palindrome (886565688).

The spelling of 636431052 in words is "six hundred thirty-six million, four hundred thirty-one thousand, fifty-two".