328393926784 has 128 divisors (see below), whose sum is σ = 815941019520. Its totient is φ = 127900631040.

The previous prime is 328393926779. The next prime is 328393926793. The reversal of 328393926784 is 487629393823.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×328393926784² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47472894 + ... + 47479810.

It is an arithmetic number, because the mean of its divisors is an integer number (6374539215).

Almost surely, 2^328393926784 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 328393926784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407970509760).

328393926784 is an abundant number, since it is smaller than the sum of its proper divisors (487547092736).

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

328393926784 is a wasteful number, since it uses less digits than its factorization.

328393926784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11766 (or 11754 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 64.

The spelling of 328393926784 in words is "three hundred twenty-eight billion, three hundred ninety-three million, nine hundred twenty-six thousand, seven hundred eighty-four".