320444421 has 24 divisors (see below), whose sum is σ = 471637152. Its totient is φ = 193380000.

The previous prime is 320444419. The next prime is 320444429. The reversal of 320444421 is 124444023.

It is a happy number.

It is not a de Polignac number, because 320444421 - 2¹ = 320444419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320444391 and 320444400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320444429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89355 + ... + 92871.

It is an arithmetic number, because the mean of its divisors is an integer number (19651548).

Almost surely, 2^320444421 is an apocalyptic number.

It is an amenable number.

320444421 is a deficient number, since it is larger than the sum of its proper divisors (151192731).

320444421 is a wasteful number, since it uses less digits than its factorization.

320444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793 (or 3782 counting only the distinct ones).

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

The square root of 320444421 is about 17900.9614546258. The cubic root of 320444421 is about 684.3068777047.

Adding to 320444421 its reverse (124444023), we get a palindrome (444888444).

The spelling of 320444421 in words is "three hundred twenty million, four hundred forty-four thousand, four hundred twenty-one".