636224132 has 6 divisors (see below), whose sum is σ = 1113392238. Its totient is φ = 318112064.

The previous prime is 636224123. The next prime is 636224143. The reversal of 636224132 is 231422636.

It can be written as a sum of positive squares in only one way, i.e., 626200576 + 10023556 = 25024^2 + 3166^2 .

It is a super-2 number, since 2×636224132² = 809562292278306848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636224095 and 636224104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79528013 + ... + 79528020.

It is an arithmetic number, because the mean of its divisors is an integer number (185565373).

Almost surely, 2^636224132 is an apocalyptic number.

It is an amenable number.

636224132 is a deficient number, since it is larger than the sum of its proper divisors (477168106).

636224132 is a wasteful number, since it uses less digits than its factorization.

636224132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159056037 (or 159056035 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 636224132 is about 25223.4837403559. The cubic root of 636224132 is about 860.0757694194.

Adding to 636224132 its reverse (231422636), we get a palindrome (867646768).

The spelling of 636224132 in words is "six hundred thirty-six million, two hundred twenty-four thousand, one hundred thirty-two".