328448821 has 2 divisors, whose sum is σ = 328448822. Its totient is φ = 328448820.

The previous prime is 328448779. The next prime is 328448843. The reversal of 328448821 is 128844823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242144721 + 86304100 = 15561^2 + 9290^2 .

It is an emirp because it is prime and its reverse (128844823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328448821 - 2¹¹ = 328446773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328448881) by changing a digit.

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 as a sum of consecutive naturals, namely, 164224410 + 164224411.

It is an arithmetic number, because the mean of its divisors is an integer number (164224411).

Almost surely, 2^328448821 is an apocalyptic number.

It is an amenable number.

328448821 is a deficient number, since it is larger than the sum of its proper divisors (1).

328448821 is an equidigital number, since it uses as much as digits as its factorization.

328448821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98304, while the sum is 40.

The square root of 328448821 is about 18123.1570373376. The cubic root of 328448821 is about 689.9578641216.

The spelling of 328448821 in words is "three hundred twenty-eight million, four hundred forty-eight thousand, eight hundred twenty-one".