320445420 has 48 divisors (see below), whose sum is σ = 914185440. Its totient is φ = 83838976.

The previous prime is 320445347. The next prime is 320445421. The reversal of 320445420 is 24544023.

It is not an unprimeable number, because it can be changed into a prime (320445421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47205 + ... + 53564.

It is an arithmetic number, because the mean of its divisors is an integer number (19045530).

Almost surely, 2^320445420 is an apocalyptic number.

320445420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320445420 is an abundant number, since it is smaller than the sum of its proper divisors (593740020).

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

320445420 is a wasteful number, since it uses less digits than its factorization.

320445420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100834 (or 100832 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 320445420 is about 17900.9893581333. The cubic root of 320445420 is about 684.3075888232.

Adding to 320445420 its reverse (24544023), we get a palindrome (344989443).

The spelling of 320445420 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred twenty".