4428004221 has 12 divisors (see below), whose sum is σ = 6504413760. Its totient is φ = 2901968520.

The previous prime is 4428004199. The next prime is 4428004237. The reversal of 4428004221 is 1224008244.

4428004221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4428004221 - 2¹³ = 4427996029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4428004241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4168965 + ... + 4170026.

It is an arithmetic number, because the mean of its divisors is an integer number (542034480).

Almost surely, 2^4428004221 is an apocalyptic number.

It is an amenable number.

4428004221 is a deficient number, since it is larger than the sum of its proper divisors (2076409539).

4428004221 is a wasteful number, since it uses less digits than its factorization.

4428004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8339056 (or 8339053 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 4428004221 is about 66543.2507546783. The cubic root of 4428004221 is about 1642.1116242213. Note that the first 3 decimals are identical.

The spelling of 4428004221 in words is "four billion, four hundred twenty-eight million, four thousand, two hundred twenty-one".