328045649 has 2 divisors, whose sum is σ = 328045650. Its totient is φ = 328045648.

The previous prime is 328045643. The next prime is 328045661. The reversal of 328045649 is 946540823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310464400 + 17581249 = 17620^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 328045649 - 2²⁸ = 59610193 is a prime.

It is a super-2 number, since 2×328045649² = 215227895655662402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (328045643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164022824 + 164022825.

It is an arithmetic number, because the mean of its divisors is an integer number (164022825).

Almost surely, 2^328045649 is an apocalyptic number.

It is an amenable number.

328045649 is a deficient number, since it is larger than the sum of its proper divisors (1).

328045649 is an equidigital number, since it uses as much as digits as its factorization.

328045649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 328045649 is about 18112.0305046121. The cubic root of 328045649 is about 689.6754400211.

The spelling of 328045649 in words is "three hundred twenty-eight million, forty-five thousand, six hundred forty-nine".