3921389876 has 12 divisors (see below), whose sum is σ = 7160799072. Its totient is φ = 1875447288.

The previous prime is 3921389873. The next prime is 3921389887. The reversal of 3921389876 is 6789831293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921389873) 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, 21311810 + ... + 21311993.

It is an arithmetic number, because the mean of its divisors is an integer number (596733256).

Almost surely, 2^3921389876 is an apocalyptic number.

It is an amenable number.

3921389876 is a deficient number, since it is larger than the sum of its proper divisors (3239409196).

3921389876 is a wasteful number, since it uses less digits than its factorization.

3921389876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42623830 (or 42623828 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 3921389876 is about 62621.0018763673. The cubic root of 3921389876 is about 1576.9333611844.

The spelling of 3921389876 in words is "three billion, nine hundred twenty-one million, three hundred eighty-nine thousand, eight hundred seventy-six".