328505785256 has 16 divisors (see below), whose sum is σ = 671943651840. Its totient is φ = 149320811440.

The previous prime is 328505785219. The next prime is 328505785303. The reversal of 328505785256 is 652587505823.

It is a super-2 number, since 2×328505785256² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866510056 + ... + 1866510231.

It is an arithmetic number, because the mean of its divisors is an integer number (41996478240).

Almost surely, 2^328505785256 is an apocalyptic number.

It is an amenable number.

328505785256 is an abundant number, since it is smaller than the sum of its proper divisors (343437866584).

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

328505785256 is a wasteful number, since it uses less digits than its factorization.

328505785256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733020304 (or 3733020300 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 56.

The spelling of 328505785256 in words is "three hundred twenty-eight billion, five hundred five million, seven hundred eighty-five thousand, two hundred fifty-six".