328448789 has 8 divisors (see below), whose sum is σ = 348977880. Its totient is φ = 309123648.

The previous prime is 328448779. The next prime is 328448821. The reversal of 328448789 is 987844823.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 159188689 + 169260100 = 12617^2 + 13010^2 .

It is not a de Polignac number, because 328448789 - 2⁴ = 328448773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328448789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328448759) 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, 28514 + ... + 38339.

It is an arithmetic number, because the mean of its divisors is an integer number (43622235).

Almost surely, 2^328448789 is an apocalyptic number.

It is an amenable number.

328448789 is a deficient number, since it is larger than the sum of its proper divisors (20529091).

328448789 is an frugal number, since it uses more digits than its factorization.

328448789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66904 (or 66870 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The square root of 328448789 is about 18123.1561544892. The cubic root of 328448789 is about 689.9578417146.

The spelling of 328448789 in words is "three hundred twenty-eight million, four hundred forty-eight thousand, seven hundred eighty-nine".