3940728836 has 12 divisors (see below), whose sum is σ = 7523209680. Its totient is φ = 1791240360.

The previous prime is 3940728791. The next prime is 3940728889. The reversal of 3940728836 is 6388270493.

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, 44780966 + ... + 44781053.

It is an arithmetic number, because the mean of its divisors is an integer number (626934140).

Almost surely, 2^3940728836 is an apocalyptic number.

It is an amenable number.

3940728836 is a deficient number, since it is larger than the sum of its proper divisors (3582480844).

3940728836 is a wasteful number, since it uses less digits than its factorization.

3940728836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89562034 (or 89562032 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 3940728836 is about 62775.2246989208. The cubic root of 3940728836 is about 1579.5214108883.

The spelling of 3940728836 in words is "three billion, nine hundred forty million, seven hundred twenty-eight thousand, eight hundred thirty-six".