320402322 has 12 divisors (see below), whose sum is σ = 694205070. Its totient is φ = 106800768.

The previous prime is 320402293. The next prime is 320402323. The reversal of 320402322 is 223204023.

It can be written as a sum of positive squares in only one way, i.e., 288014841 + 32387481 = 16971^2 + 5691^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17800129 = 320402322 / (3 + 2 + 0 + 4 + 0 + 2 + 3 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 320402295 and 320402304.

It is not an unprimeable number, because it can be changed into a prime (320402323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8900047 + ... + 8900082.

Almost surely, 2^320402322 is an apocalyptic number.

320402322 is an abundant number, since it is smaller than the sum of its proper divisors (373802748).

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

320402322 is a wasteful number, since it uses less digits than its factorization.

320402322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17800137 (or 17800134 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 320402322 is about 17899.7855294414. The cubic root of 320402322 is about 684.2769090164.

Adding to 320402322 its reverse (223204023), we get a palindrome (543606345).

The spelling of 320402322 in words is "three hundred twenty million, four hundred two thousand, three hundred twenty-two".