328941640 has 16 divisors (see below), whose sum is σ = 740118780. Its totient is φ = 131576640.

The previous prime is 328941631. The next prime is 328941643. The reversal of 328941640 is 46149823.

It can be written as a sum of positive squares in 2 ways, for example, as 275095396 + 53846244 = 16586^2 + 7338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 328941640.

It is not an unprimeable number, because it can be changed into a prime (328941643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4111731 + ... + 4111810.

Almost surely, 2^328941640 is an apocalyptic number.

It is an amenable number.

328941640 is an abundant number, since it is smaller than the sum of its proper divisors (411177140).

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

328941640 is a wasteful number, since it uses less digits than its factorization.

328941640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223552 (or 8223548 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 328941640 is about 18136.7483303926. The cubic root of 328941640 is about 690.3027726757.

The spelling of 328941640 in words is "three hundred twenty-eight million, nine hundred forty-one thousand, six hundred forty".