3936642788 has 12 divisors (see below), whose sum is σ = 7419057660. Its totient is φ = 1816912032.

The previous prime is 3936642767. The next prime is 3936642847. The reversal of 3936642788 is 8872466393.

It is a happy number.

3936642788 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 461304484 + 3475338304 = 21478^2 + 58952^2 .

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, 37852283 + ... + 37852386.

It is an arithmetic number, because the mean of its divisors is an integer number (618254805).

Almost surely, 2^3936642788 is an apocalyptic number.

It is an amenable number.

3936642788 is a deficient number, since it is larger than the sum of its proper divisors (3482414872).

3936642788 is a wasteful number, since it uses less digits than its factorization.

3936642788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75704686 (or 75704684 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The square root of 3936642788 is about 62742.6711895501. The cubic root of 3936642788 is about 1578.9752993674.

The spelling of 3936642788 in words is "three billion, nine hundred thirty-six million, six hundred forty-two thousand, seven hundred eighty-eight".