328646687 has 4 divisors (see below), whose sum is σ = 330740136. Its totient is φ = 326553240.

The previous prime is 328646671. The next prime is 328646699. The reversal of 328646687 is 786646823.

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 328646687 - 2⁴ = 328646671 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 (328646387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046489 + ... + 1046802.

It is an arithmetic number, because the mean of its divisors is an integer number (82685034).

Almost surely, 2^328646687 is an apocalyptic number.

328646687 is a deficient number, since it is larger than the sum of its proper divisors (2093449).

328646687 is a wasteful number, since it uses less digits than its factorization.

328646687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093448.

The product of its digits is 2322432, while the sum is 50.

The square root of 328646687 is about 18128.6151429170. The cubic root of 328646687 is about 690.0963857511.

The spelling of 328646687 in words is "three hundred twenty-eight million, six hundred forty-six thousand, six hundred eighty-seven".