320543040 has 112 divisors (see below), whose sum is σ = 1021567680. Its totient is φ = 85155840.

The previous prime is 320543033. The next prime is 320543059. The reversal of 320543040 is 40345023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320542998 and 320543016.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 363400 + ... + 364280.

It is an arithmetic number, because the mean of its divisors is an integer number (9121140).

Almost surely, 2^320543040 is an apocalyptic number.

320543040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320543040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510783840).

320543040 is an abundant number, since it is smaller than the sum of its proper divisors (701024640).

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

320543040 is a wasteful number, since it uses less digits than its factorization.

320543040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 320543040 is about 17903.7158154390. The cubic root of 320543040 is about 684.3770705719.

Adding to 320543040 its reverse (40345023), we get a palindrome (360888063).

The spelling of 320543040 in words is "three hundred twenty million, five hundred forty-three thousand, forty".