320138322 has 32 divisors (see below), whose sum is σ = 774790272. Its totient is φ = 86087424.

The previous prime is 320138303. The next prime is 320138323. The reversal of 320138322 is 223831023.

It is a junction number, because it is equal to n+sod(n) for n = 320138292 and 320138301.

It is not an unprimeable number, because it can be changed into a prime (320138323) by changing a digit.

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, 223473 + ... + 224900.

It is an arithmetic number, because the mean of its divisors is an integer number (24212196).

Almost surely, 2^320138322 is an apocalyptic number.

320138322 is an abundant number, since it is smaller than the sum of its proper divisors (454651950).

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

320138322 is a wasteful number, since it uses less digits than its factorization.

320138322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448402.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 320138322 is about 17892.4096197242. The cubic root of 320138322 is about 684.0889175127.

Adding to 320138322 its reverse (223831023), we get a palindrome (543969345).

The spelling of 320138322 in words is "three hundred twenty million, one hundred thirty-eight thousand, three hundred twenty-two".