4444684821 has 24 divisors (see below), whose sum is σ = 6510568064. Its totient is φ = 2921598720.

The previous prime is 4444684787. The next prime is 4444684837. The reversal of 4444684821 is 1284864444.

It is not a de Polignac number, because 4444684821 - 2¹⁰ = 4444683797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444684891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227190 + ... + 245976.

Almost surely, 2^4444684821 is an apocalyptic number.

It is an amenable number.

4444684821 is a deficient number, since it is larger than the sum of its proper divisors (2065883243).

4444684821 is a wasteful number, since it uses less digits than its factorization.

4444684821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19161 (or 19158 counting only the distinct ones).

The product of its digits is 786432, while the sum is 45.

The square root of 4444684821 is about 66668.4694664577. The cubic root of 4444684821 is about 1644.1710233308.

The spelling of 4444684821 in words is "four billion, four hundred forty-four million, six hundred eighty-four thousand, eight hundred twenty-one".