4420443921 has 16 divisors (see below), whose sum is σ = 6241967424. Its totient is φ = 2773016064.

The previous prime is 4420443919. The next prime is 4420443997. The reversal of 4420443921 is 1293440244.

It is not a de Polignac number, because 4420443921 - 2¹ = 4420443919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4420445921) 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 15 ways as a sum of consecutive naturals, for example, 468765 + ... + 478101.

It is an arithmetic number, because the mean of its divisors is an integer number (390122964).

Almost surely, 2^4420443921 is an apocalyptic number.

It is an amenable number.

4420443921 is a deficient number, since it is larger than the sum of its proper divisors (1821523503).

4420443921 is a wasteful number, since it uses less digits than its factorization.

4420443921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18640.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 4420443921 is about 66486.4190718676. The cubic root of 4420443921 is about 1641.1765205612.

The spelling of 4420443921 in words is "four billion, four hundred twenty million, four hundred forty-three thousand, nine hundred twenty-one".