631685732 has 24 divisors (see below), whose sum is σ = 1116613176. Its totient is φ = 312668928.

The previous prime is 631685701. The next prime is 631685741. The reversal of 631685732 is 237586136.

It can be written as a sum of positive squares in 4 ways, for example, as 132342016 + 499343716 = 11504^2 + 22346^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 631685732.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182288 + ... + 185720.

It is an arithmetic number, because the mean of its divisors is an integer number (46525549).

Almost surely, 2^631685732 is an apocalyptic number.

It is an amenable number.

631685732 is a deficient number, since it is larger than the sum of its proper divisors (484927444).

631685732 is a wasteful number, since it uses less digits than its factorization.

631685732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887 (or 3885 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 631685732 is about 25133.3589478207. The cubic root of 631685732 is about 858.0258177454.

The spelling of 631685732 in words is "six hundred thirty-one million, six hundred eighty-five thousand, seven hundred thirty-two".