3978320708 has 12 divisors (see below), whose sum is σ = 6984449472. Its totient is φ = 1982763720.

The previous prime is 3978320701. The next prime is 3978320747. The reversal of 3978320708 is 8070238793.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3978320701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1597760 + ... + 1600247.

It is an arithmetic number, because the mean of its divisors is an integer number (582037456).

Almost surely, 2^3978320708 is an apocalyptic number.

It is an amenable number.

3978320708 is a deficient number, since it is larger than the sum of its proper divisors (3006128764).

3978320708 is a wasteful number, since it uses less digits than its factorization.

3978320708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198322 (or 3198320 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 3978320708 is about 63073.9304943017. The cubic root of 3978320708 is about 1584.5280443918.

The spelling of 3978320708 in words is "three billion, nine hundred seventy-eight million, three hundred twenty thousand, seven hundred eight".