320505340 has 24 divisors (see below), whose sum is σ = 674083872. Its totient is φ = 128007360.

The previous prime is 320505337. The next prime is 320505349. The reversal of 320505340 is 43505023.

320505340 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320505349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 25375.

It is an arithmetic number, because the mean of its divisors is an integer number (28086828).

Almost surely, 2^320505340 is an apocalyptic number.

It is an amenable number.

320505340 is an abundant number, since it is smaller than the sum of its proper divisors (353578532).

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

320505340 is a wasteful number, since it uses less digits than its factorization.

320505340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24357 (or 24355 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 320505340 is about 17902.6629304135. The cubic root of 320505340 is about 684.3502389935.

The spelling of 320505340 in words is "three hundred twenty million, five hundred five thousand, three hundred forty".