3971828971828 has 12 divisors (see below), whose sum is σ = 6976349044672. Its totient is φ = 1978586387640.

The previous prime is 3971828971783. The next prime is 3971828971829. The reversal of 3971828971828 is 8281798281793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971828971829) 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, 1832023350 + ... + 1832025517.

Almost surely, 2^{3971828971828} is an apocalyptic number.

It is an amenable number.

3971828971828 is a deficient number, since it is larger than the sum of its proper divisors (3004520072844).

3971828971828 is a wasteful number, since it uses less digits than its factorization.

3971828971828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664049142 (or 3664049140 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 73.

The spelling of 3971828971828 in words is "three trillion, nine hundred seventy-one billion, eight hundred twenty-eight million, nine hundred seventy-one thousand, eight hundred twenty-eight".