321489708 has 48 divisors (see below), whose sum is σ = 778632960. Its totient is φ = 103118400.

The previous prime is 321489697. The next prime is 321489731. The reversal of 321489708 is 807984123.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 321489708.

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, 113793 + ... + 116583.

It is an arithmetic number, because the mean of its divisors is an integer number (16221520).

Almost surely, 2^321489708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321489708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389316480).

321489708 is an abundant number, since it is smaller than the sum of its proper divisors (457143252).

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

321489708 is a wasteful number, since it uses less digits than its factorization.

321489708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158 (or 3156 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 321489708 is about 17930.1340764647. The cubic root of 321489708 is about 685.0501378756.

The spelling of 321489708 in words is "three hundred twenty-one million, four hundred eighty-nine thousand, seven hundred eight".