3985047856 has 20 divisors (see below), whose sum is σ = 7851897000. Its totient is φ = 1958751872.

The previous prime is 3985047841. The next prime is 3985047887. The reversal of 3985047856 is 6587405893.

It is a super-2 number, since 2×3985047856² = 31761212829220393472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3985047797 and 3985047806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109781 + ... + 2111668.

It is an arithmetic number, because the mean of its divisors is an integer number (392594850).

Almost surely, 2^3985047856 is an apocalyptic number.

It is an amenable number.

3985047856 is a deficient number, since it is larger than the sum of its proper divisors (3866849144).

3985047856 is a wasteful number, since it uses less digits than its factorization.

3985047856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221516 (or 4221510 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The square root of 3985047856 is about 63127.2354534871. The cubic root of 3985047856 is about 1585.4206615648.

The spelling of 3985047856 in words is "three billion, nine hundred eighty-five million, forty-seven thousand, eight hundred fifty-six".