320421444 has 48 divisors (see below), whose sum is σ = 862044288. Its totient is φ = 90736128.

The previous prime is 320421433. The next prime is 320421463. The reversal of 320421444 is 444124023.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7387 + ... + 26370.

It is an arithmetic number, because the mean of its divisors is an integer number (17959256).

Almost surely, 2^320421444 is an apocalyptic number.

It is an amenable number.

320421444 is an abundant number, since it is smaller than the sum of its proper divisors (541622844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320421444 is a wasteful number, since it uses less digits than its factorization.

320421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33884 (or 33882 counting only the distinct ones).

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

The square root of 320421444 is about 17900.3196619502. The cubic root of 320421444 is about 684.2905215714.

Adding to 320421444 its reverse (444124023), we get a palindrome (764545467).

The spelling of 320421444 in words is "three hundred twenty million, four hundred twenty-one thousand, four hundred forty-four".