636142732 has 12 divisors (see below), whose sum is σ = 1128500296. Its totient is φ = 313714080.

The previous prime is 636142721. The next prime is 636142769. The reversal of 636142732 is 237241636.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088994 + ... + 1089577.

Almost surely, 2^636142732 is an apocalyptic number.

It is an amenable number.

636142732 is a deficient number, since it is larger than the sum of its proper divisors (492357564).

636142732 is a wasteful number, since it uses less digits than its factorization.

636142732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178648 (or 2178646 counting only the distinct ones).

The product of its digits is 36288, while the sum is 34.

The square root of 636142732 is about 25221.8701130586. The cubic root of 636142732 is about 860.0390878214.

The spelling of 636142732 in words is "six hundred thirty-six million, one hundred forty-two thousand, seven hundred thirty-two".