3927384021 has 16 divisors (see below), whose sum is σ = 5960931840. Its totient is φ = 2276743920.

The previous prime is 3927384011. The next prime is 3927384053. The reversal of 3927384021 is 1204837293.

It is a de Polignac number, because none of the positive numbers 2^k-3927384021 is a prime.

It is a super-2 number, since 2×3927384021² = 30848690496812256882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3927384011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2586451 + ... + 2587968.

It is an arithmetic number, because the mean of its divisors is an integer number (372558240).

Almost surely, 2^3927384021 is an apocalyptic number.

It is an amenable number.

3927384021 is a deficient number, since it is larger than the sum of its proper divisors (2033547819).

3927384021 is a wasteful number, since it uses less digits than its factorization.

3927384021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174456.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 3927384021 is about 62668.8441013555. The cubic root of 3927384021 is about 1577.7364399723.

The spelling of 3927384021 in words is "three billion, nine hundred twenty-seven million, three hundred eighty-four thousand, twenty-one".