321608 has 16 divisors (see below), whose sum is σ = 689280. Its totient is φ = 137808.

The previous prime is 321593. The next prime is 321611. The reversal of 321608 is 806123.

It is a self number, because there is not a number n which added to its sum of digits gives 321608.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321608.

It is an unprimeable number.

321608 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2816 + ... + 2927.

It is an arithmetic number, because the mean of its divisors is an integer number (43080).

2³²¹⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

321608 is an abundant number, since it is smaller than the sum of its proper divisors (367672).

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

321608 is a wasteful number, since it uses less digits than its factorization.

321608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756 (or 5752 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 321608 is about 567.1049285626. The cubic root of 321608 is about 68.5134148874.

It can be divided in two parts, 321 and 608, that added together give a palindrome (929).

The spelling of 321608 in words is "three hundred twenty-one thousand, six hundred eight".