320741040 has 160 divisors (see below), whose sum is σ = 1062789120. Its totient is φ = 79736832.

The previous prime is 320741039. The next prime is 320741059. The reversal of 320741040 is 40147023.

It is a junction number, because it is equal to n+sod(n) for n = 320740998 and 320741016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517851 + ... + 518469.

It is an arithmetic number, because the mean of its divisors is an integer number (6642432).

Almost surely, 2^320741040 is an apocalyptic number.

320741040 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 320741040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531394560).

320741040 is an abundant number, since it is smaller than the sum of its proper divisors (742048080).

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

320741040 is a wasteful number, since it uses less digits than its factorization.

320741040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 320741040 is about 17909.2445401809. The cubic root of 320741040 is about 684.5179552080.

Adding to 320741040 its reverse (40147023), we get a palindrome (360888063).

The spelling of 320741040 in words is "three hundred twenty million, seven hundred forty-one thousand, forty".