320326420 has 12 divisors (see below), whose sum is σ = 672685524. Its totient is φ = 128130560.

The previous prime is 320326403. The next prime is 320326421. The reversal of 320326420 is 24623023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87946884 + 232379536 = 9378^2 + 15244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320326391 and 320326400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320326421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8008141 + ... + 8008180.

It is an arithmetic number, because the mean of its divisors is an integer number (56057127).

Almost surely, 2^320326420 is an apocalyptic number.

It is an amenable number.

320326420 is an abundant number, since it is smaller than the sum of its proper divisors (352359104).

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

320326420 is a wasteful number, since it uses less digits than its factorization.

320326420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016330 (or 16016328 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 320326420 is about 17897.6652108592. The cubic root of 320326420 is about 684.2228706150. Note that the first 3 decimals are identical.

Adding to 320326420 its reverse (24623023), we get a palindrome (344949443).

The spelling of 320326420 in words is "three hundred twenty million, three hundred twenty-six thousand, four hundred twenty".