639302036 has 12 divisors (see below), whose sum is σ = 1124459028. Its totient is φ = 318028032.

The previous prime is 639302029. The next prime is 639302047. The reversal of 639302036 is 630203936.

639302036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 477859600 + 161442436 = 21860^2 + 12706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 639301993 and 639302011.

It is a congruent number.

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, 404861 + ... + 406436.

It is an arithmetic number, because the mean of its divisors is an integer number (93704919).

Almost surely, 2^639302036 is an apocalyptic number.

It is an amenable number.

639302036 is a deficient number, since it is larger than the sum of its proper divisors (485156992).

639302036 is a wasteful number, since it uses less digits than its factorization.

639302036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811498 (or 811496 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 32.

The square root of 639302036 is about 25284.4227934909. The cubic root of 639302036 is about 861.4604875083.

The spelling of 639302036 in words is "six hundred thirty-nine million, three hundred two thousand, thirty-six".