321004424 has 32 divisors (see below), whose sum is σ = 648986520. Its totient is φ = 147972096.

The previous prime is 321004423. The next prime is 321004429. The reversal of 321004424 is 424400123.

It can be written as a sum of positive squares in 4 ways, for example, as 169468324 + 151536100 = 13018^2 + 12310^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321004396 and 321004405.

It is not an unprimeable number, because it can be changed into a prime (321004423) 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, 118574 + ... + 121250.

Almost surely, 2^321004424 is an apocalyptic number.

It is an amenable number.

321004424 is an abundant number, since it is smaller than the sum of its proper divisors (327982096).

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

321004424 is a wasteful number, since it uses less digits than its factorization.

321004424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849 (or 3845 counting only the distinct ones).

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

The square root of 321004424 is about 17916.5963285441. The cubic root of 321004424 is about 684.7052732487.

Adding to 321004424 its reverse (424400123), we get a palindrome (745404547).

The spelling of 321004424 in words is "three hundred twenty-one million, four thousand, four hundred twenty-four".