3978718764 has 24 divisors (see below), whose sum is σ = 9350470080. Its totient is φ = 1316697744.

The previous prime is 3978718747. The next prime is 3978718789. The reversal of 3978718764 is 4678178793.

It is a junction number, because it is equal to n+sod(n) for n = 3978718698 and 3978718707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190994 + ... + 1194329.

It is an arithmetic number, because the mean of its divisors is an integer number (389602920).

Almost surely, 2^3978718764 is an apocalyptic number.

It is an amenable number.

3978718764 is an abundant number, since it is smaller than the sum of its proper divisors (5371751316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978718764 is a wasteful number, since it uses less digits than its factorization.

3978718764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385469 (or 2385467 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 60.

The square root of 3978718764 is about 63077.0858870319. The cubic root of 3978718764 is about 1584.5808899604.

The spelling of 3978718764 in words is "three billion, nine hundred seventy-eight million, seven hundred eighteen thousand, seven hundred sixty-four".