322320432 has 120 divisors (see below), whose sum is σ = 991442496. Its totient is φ = 89921664.

The previous prime is 322320421. The next prime is 322320433. The reversal of 322320432 is 234023223.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 322320399 and 322320408.

It is not an unprimeable number, because it can be changed into a prime (322320433) 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, 99543 + ... + 102729.

Almost surely, 2^322320432 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 322320432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495721248).

322320432 is an abundant number, since it is smaller than the sum of its proper divisors (669122064).

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

322320432 is a wasteful number, since it uses less digits than its factorization.

322320432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3242 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 322320432 is about 17953.2847133888. The cubic root of 322320432 is about 685.6396830545.

Adding to 322320432 its reverse (234023223), we get a palindrome (556343655).

The spelling of 322320432 in words is "three hundred twenty-two million, three hundred twenty thousand, four hundred thirty-two".