3947993824 has 24 divisors (see below), whose sum is σ = 7777070280. Its totient is φ = 1972864896.

The previous prime is 3947993821. The next prime is 3947993839. The reversal of 3947993824 is 4283997493.

3947993824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947993821) 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, 22767 + ... + 91729.

It is an arithmetic number, because the mean of its divisors is an integer number (324044595).

Almost surely, 2^3947993824 is an apocalyptic number.

It is an amenable number.

3947993824 is a deficient number, since it is larger than the sum of its proper divisors (3829076456).

3947993824 is a wasteful number, since it uses less digits than its factorization.

3947993824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70762 (or 70754 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 58.

The square root of 3947993824 is about 62833.0631435393. The cubic root of 3947993824 is about 1580.4914649084.

The spelling of 3947993824 in words is "three billion, nine hundred forty-seven million, nine hundred ninety-three thousand, eight hundred twenty-four".