321004420 has 24 divisors (see below), whose sum is σ = 735392448. Its totient is φ = 116728800.

The previous prime is 321004381. The next prime is 321004423. The reversal of 321004420 is 24400123.

It is a junction number, because it is equal to n+sod(n) for n = 321004394 and 321004403.

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, 729336 + ... + 729775.

It is an arithmetic number, because the mean of its divisors is an integer number (30641352).

Almost surely, 2^321004420 is an apocalyptic number.

It is an amenable number.

321004420 is an abundant number, since it is smaller than the sum of its proper divisors (414388028).

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

321004420 is a wasteful number, since it uses less digits than its factorization.

321004420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459131 (or 1459129 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 321004420 is about 17916.5962169158. The cubic root of 321004420 is about 684.7052704047.

Adding to 321004420 its reverse (24400123), we get a palindrome (345404543).

The spelling of 321004420 in words is "three hundred twenty-one million, four thousand, four hundred twenty".