3856220571 has 24 divisors (see below), whose sum is σ = 5997457920. Its totient is φ = 2197519632.

The previous prime is 3856220561. The next prime is 3856220573. The reversal of 3856220571 is 1750226583.

It is not a de Polignac number, because 3856220571 - 2⁹ = 3856220059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3856220573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18210 + ... + 89688.

It is an arithmetic number, because the mean of its divisors is an integer number (249894080).

Almost surely, 2^3856220571 is an apocalyptic number.

3856220571 is a deficient number, since it is larger than the sum of its proper divisors (2141237349).

3856220571 is a wasteful number, since it uses less digits than its factorization.

3856220571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71863 (or 71856 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 3856220571 is about 62098.4747880332. The cubic root of 3856220571 is about 1568.1488684657.

The spelling of 3856220571 in words is "three billion, eight hundred fifty-six million, two hundred twenty thousand, five hundred seventy-one".