4404423021 has 8 divisors (see below), whose sum is σ = 5902075200. Its totient is φ = 2921526432.

The previous prime is 4404422989. The next prime is 4404423029. The reversal of 4404423021 is 1203244044.

It is a happy number.

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

It is not a de Polignac number, because 4404423021 - 2⁵ = 4404422989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4404422982 and 4404423000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4404423029) 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, 3688200 + ... + 3689393.

It is an arithmetic number, because the mean of its divisors is an integer number (737759400).

Almost surely, 2^4404423021 is an apocalyptic number.

It is an amenable number.

4404423021 is a deficient number, since it is larger than the sum of its proper divisors (1497652179).

4404423021 is a wasteful number, since it uses less digits than its factorization.

4404423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7377795.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 4404423021 is about 66365.8272079841. The cubic root of 4404423021 is about 1639.1914293202.

Adding to 4404423021 its reverse (1203244044), we get a palindrome (5607667065).

The spelling of 4404423021 in words is "four billion, four hundred four million, four hundred twenty-three thousand, twenty-one".