4400320421 has 8 divisors (see below), whose sum is σ = 5030735424. Its totient is φ = 3770354880.

The previous prime is 4400320411. The next prime is 4400320427. The reversal of 4400320421 is 1240230044.

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 4400320421 - 2¹⁴ = 4400304037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4400320393 and 4400320402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4400320427) 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, 91115 + ... + 130776.

It is an arithmetic number, because the mean of its divisors is an integer number (628841928).

Almost surely, 2^4400320421 is an apocalyptic number.

It is an amenable number.

4400320421 is a deficient number, since it is larger than the sum of its proper divisors (630415003).

4400320421 is a wasteful number, since it uses less digits than its factorization.

4400320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224731.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4400320421 is about 66334.9110273015. The cubic root of 4400320421 is about 1638.6823171662.

Adding to 4400320421 its reverse (1240230044), we get a palindrome (5640550465).

The spelling of 4400320421 in words is "four billion, four hundred million, three hundred twenty thousand, four hundred twenty-one".