320875520 has 132 divisors (see below), whose sum is σ = 896094720. Its totient is φ = 109928448.

The previous prime is 320875441. The next prime is 320875531. The reversal of 320875520 is 25578023.

It is a super-2 number, since 2×320875520² = 205922198670540800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250241 + ... + 251519.

Almost surely, 2^320875520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320875520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448047360).

320875520 is an abundant number, since it is smaller than the sum of its proper divisors (575219200).

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

320875520 is a wasteful number, since it uses less digits than its factorization.

320875520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 320875520 is about 17912.9986322782. The cubic root of 320875520 is about 684.6136098543.

The spelling of 320875520 in words is "three hundred twenty million, eight hundred seventy-five thousand, five hundred twenty".