4402928021 has 2 divisors, whose sum is σ = 4402928022. Its totient is φ = 4402928020.

The previous prime is 4402928017. The next prime is 4402928137. The reversal of 4402928021 is 1208292044.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3381422500 + 1021505521 = 58150^2 + 31961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4402928021 - 2² = 4402928017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4402928521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2201464010 + 2201464011.

It is an arithmetic number, because the mean of its divisors is an integer number (2201464011).

Almost surely, 2^4402928021 is an apocalyptic number.

It is an amenable number.

4402928021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4402928021 is an equidigital number, since it uses as much as digits as its factorization.

4402928021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 4402928021 is about 66354.5629252428. The cubic root of 4402928021 is about 1639.0059439194.

The spelling of 4402928021 in words is "four billion, four hundred two million, nine hundred twenty-eight thousand, twenty-one".