4439021644 has 6 divisors (see below), whose sum is σ = 7768287884. Its totient is φ = 2219510820.

The previous prime is 4439021633. The next prime is 4439021659. The reversal of 4439021644 is 4461209344.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554877702 + ... + 554877709.

Almost surely, 2^4439021644 is an apocalyptic number.

It is an amenable number.

4439021644 is a deficient number, since it is larger than the sum of its proper divisors (3329266240).

4439021644 is a wasteful number, since it uses less digits than its factorization.

4439021644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109755415 (or 1109755413 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 4439021644 is about 66625.9832497803. The cubic root of 4439021644 is about 1643.4724219434.

The spelling of 4439021644 in words is "four billion, four hundred thirty-nine million, twenty-one thousand, six hundred forty-four".