328566647 has 4 divisors (see below), whose sum is σ = 330234696. Its totient is φ = 326898600.

The previous prime is 328566643. The next prime is 328566673. The reversal of 328566647 is 746665823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328566647 - 2² = 328566643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328566643) 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 in 3 ways as a sum of consecutive naturals, for example, 833729 + ... + 834122.

It is an arithmetic number, because the mean of its divisors is an integer number (82558674).

Almost surely, 2^328566647 is an apocalyptic number.

328566647 is a deficient number, since it is larger than the sum of its proper divisors (1668049).

328566647 is a wasteful number, since it uses less digits than its factorization.

328566647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668048.

The product of its digits is 1451520, while the sum is 47.

The square root of 328566647 is about 18126.4074488024. The cubic root of 328566647 is about 690.0403582079.

The spelling of 328566647 in words is "three hundred twenty-eight million, five hundred sixty-six thousand, six hundred forty-seven".