328221742472 has 36 divisors (see below), whose sum is σ = 666439727535. Its totient is φ = 151477235520.

The previous prime is 328221742441. The next prime is 328221742493. The reversal of 328221742472 is 274247122823.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 12393478276 + 315828264196 = 111326^2 + 561986^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=405106.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 21057722 + ... + 21073302.

Almost surely, 2^328221742472 is an apocalyptic number.

It is an amenable number.

328221742472 is an abundant number, since it is smaller than the sum of its proper divisors (338217985063).

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

328221742472 is an frugal number, since it uses more digits than its factorization.

328221742472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194 (or 15596 counting only the distinct ones).

The product of its digits is 602112, while the sum is 44.

The spelling of 328221742472 in words is "three hundred twenty-eight billion, two hundred twenty-one million, seven hundred forty-two thousand, four hundred seventy-two".