4044443021 has 8 divisors (see below), whose sum is σ = 4289303160. Its totient is φ = 3800355328.

The previous prime is 4044442973. The next prime is 4044443057. The reversal of 4044443021 is 1203444404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 974064100 + 3070378921 = 31210^2 + 55411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4044443021 - 2³⁰ = 2970701197 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 (4044443071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182306 + ... + 203283.

It is an arithmetic number, because the mean of its divisors is an integer number (536162895).

Almost surely, 2^4044443021 is an apocalyptic number.

It is an amenable number.

4044443021 is a deficient number, since it is larger than the sum of its proper divisors (244860139).

4044443021 is a wasteful number, since it uses less digits than its factorization.

4044443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386223.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 4044443021 is about 63595.9355698145. The cubic root of 4044443021 is about 1593.2584865851.

Adding to 4044443021 its reverse (1203444404), we get a palindrome (5247887425).

The spelling of 4044443021 in words is "four billion, forty-four million, four hundred forty-three thousand, twenty-one".