328571665 has 32 divisors (see below), whose sum is σ = 426746880. Its totient is φ = 241972224.

The previous prime is 328571657. The next prime is 328571669. The reversal of 328571665 is 566175823.

It is a cyclic number.

It is not a de Polignac number, because 328571665 - 2³ = 328571657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328571669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1121259 + ... + 1121551.

It is an arithmetic number, because the mean of its divisors is an integer number (13335840).

Almost surely, 2^328571665 is an apocalyptic number.

It is an amenable number.

328571665 is a deficient number, since it is larger than the sum of its proper divisors (98175215).

328571665 is a wasteful number, since it uses less digits than its factorization.

328571665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 302400, while the sum is 43.

The square root of 328571665 is about 18126.5458651118. The cubic root of 328571665 is about 690.0438710466.

The spelling of 328571665 in words is "three hundred twenty-eight million, five hundred seventy-one thousand, six hundred sixty-five".