4439456421 has 16 divisors (see below), whose sum is σ = 5948646528. Its totient is φ = 2944972800.

The previous prime is 4439456369. The next prime is 4439456431. The reversal of 4439456421 is 1246549344.

It is not a de Polignac number, because 4439456421 - 2¹¹ = 4439454373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4439456431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669525 + ... + 1672181.

It is an arithmetic number, because the mean of its divisors is an integer number (371790408).

Almost surely, 2^4439456421 is an apocalyptic number.

It is an amenable number.

4439456421 is a deficient number, since it is larger than the sum of its proper divisors (1509190107).

4439456421 is a wasteful number, since it uses less digits than its factorization.

4439456421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212.

The product of its digits is 414720, while the sum is 42.

The square root of 4439456421 is about 66629.2459885297. The cubic root of 4439456421 is about 1643.5260764600.

The spelling of 4439456421 in words is "four billion, four hundred thirty-nine million, four hundred fifty-six thousand, four hundred twenty-one".