3978315792 has 120 divisors (see below), whose sum is σ = 12860471520. Its totient is φ = 1134627840.

The previous prime is 3978315769. The next prime is 3978315793. The reversal of 3978315792 is 2975138793.

3978315792 is a `hidden beast` number, since 39 + 7 + 8 + 31 + 579 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (3978315793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46942 + ... + 100797.

It is an arithmetic number, because the mean of its divisors is an integer number (107170596).

Almost surely, 2^3978315792 is an apocalyptic number.

It is an amenable number.

3978315792 is an abundant number, since it is smaller than the sum of its proper divisors (8882155728).

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

3978315792 is a wasteful number, since it uses less digits than its factorization.

3978315792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147781 (or 147772 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 3978315792 is about 63073.8915241481. The cubic root of 3978315792 is about 1584.5273917259.

The spelling of 3978315792 in words is "three billion, nine hundred seventy-eight million, three hundred fifteen thousand, seven hundred ninety-two".