3992221856 has 96 divisors (see below), whose sum is σ = 9298219392. Its totient is φ = 1651553280.

The previous prime is 3992221847. The next prime is 3992221889. The reversal of 3992221856 is 6581222993.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3992221856.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1083890 + ... + 1087566.

It is an arithmetic number, because the mean of its divisors is an integer number (96856452).

Almost surely, 2^3992221856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3992221856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4649109696).

3992221856 is an abundant number, since it is smaller than the sum of its proper divisors (5305997536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3992221856 is a wasteful number, since it uses less digits than its factorization.

3992221856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862 (or 3854 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 3992221856 is about 63184.0316535753. The cubic root of 3992221856 is about 1586.3714648258.

The spelling of 3992221856 in words is "three billion, nine hundred ninety-two million, two hundred twenty-one thousand, eight hundred fifty-six".