328391385256 has 32 divisors (see below), whose sum is σ = 671747515200. Its totient is φ = 149260397440.

The previous prime is 328391385251. The next prime is 328391385263. The reversal of 328391385256 is 652583193823.

It is a happy number.

It is a super-2 number, since 2×328391385256² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 328391385197 and 328391385206.

It is not an unprimeable number, because it can be changed into a prime (328391385251) 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, 1625796 + ... + 1816588.

It is an arithmetic number, because the mean of its divisors is an integer number (20992109850).

Almost surely, 2^328391385256 is an apocalyptic number.

It is an amenable number.

328391385256 is an abundant number, since it is smaller than the sum of its proper divisors (343356129944).

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

328391385256 is a wasteful number, since it uses less digits than its factorization.

328391385256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210369 (or 210365 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 55.

The spelling of 328391385256 in words is "three hundred twenty-eight billion, three hundred ninety-one million, three hundred eighty-five thousand, two hundred fifty-six".