320345420 has 24 divisors (see below), whose sum is σ = 687040704. Its totient is φ = 125411456.

The previous prime is 320345419. The next prime is 320345429. The reversal of 320345420 is 24543023.

It is a super-2 number, since 2×320345420² = 205242376229952800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320345429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169457 + ... + 171336.

It is an arithmetic number, because the mean of its divisors is an integer number (28626696).

Almost surely, 2^320345420 is an apocalyptic number.

It is an amenable number.

320345420 is an abundant number, since it is smaller than the sum of its proper divisors (366695284).

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

320345420 is a wasteful number, since it uses less digits than its factorization.

320345420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340849 (or 340847 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 320345420 is about 17898.1959984798. The cubic root of 320345420 is about 684.2363984590.

Adding to 320345420 its reverse (24543023), we get a palindrome (344888443).

The spelling of 320345420 in words is "three hundred twenty million, three hundred forty-five thousand, four hundred twenty".