4401443421 has 16 divisors (see below), whose sum is σ = 6521785920. Its totient is φ = 2933787600.

The previous prime is 4401443401. The next prime is 4401443441. The reversal of 4401443421 is 1243441044.

It is an interprime number because it is at equal distance from previous prime (4401443401) and next prime (4401443441).

It is not a de Polignac number, because 4401443421 - 2¹⁸ = 4401181277 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4401443401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208666 + ... + 228788.

It is an arithmetic number, because the mean of its divisors is an integer number (407611620).

Almost surely, 2^4401443421 is an apocalyptic number.

It is an amenable number.

4401443421 is a deficient number, since it is larger than the sum of its proper divisors (2120342499).

4401443421 is a wasteful number, since it uses less digits than its factorization.

4401443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28233 (or 28227 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 4401443421 is about 66343.3751101042. The cubic root of 4401443421 is about 1638.8217072969.

Adding to 4401443421 its reverse (1243441044), we get a palindrome (5644884465).

The spelling of 4401443421 in words is "four billion, four hundred one million, four hundred forty-three thousand, four hundred twenty-one".