320304132 has 72 divisors (see below), whose sum is σ = 843897600. Its totient is φ = 106227936.

The previous prime is 320304113. The next prime is 320304133. The reversal of 320304132 is 231403023.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (320304133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221869 + ... + 223307.

It is an arithmetic number, because the mean of its divisors is an integer number (11720800).

Almost surely, 2^320304132 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 320304132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421948800).

320304132 is an abundant number, since it is smaller than the sum of its proper divisors (523593468).

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

320304132 is a wasteful number, since it uses less digits than its factorization.

320304132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320304132 is about 17897.0425489800. The cubic root of 320304132 is about 684.2070010602.

Adding to 320304132 its reverse (231403023), we get a palindrome (551707155).

The spelling of 320304132 in words is "three hundred twenty million, three hundred four thousand, one hundred thirty-two".