328664287 has 4 divisors (see below), whose sum is σ = 375616336. Its totient is φ = 281712240.

The previous prime is 328664257. The next prime is 328664291. The reversal of 328664287 is 782466823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782466823 = 25943 ⋅30161.

It is a cyclic number.

It is not a de Polignac number, because 328664287 - 2¹¹ = 328662239 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 (328664207) 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, 23476014 + ... + 23476027.

It is an arithmetic number, because the mean of its divisors is an integer number (93904084).

Almost surely, 2^328664287 is an apocalyptic number.

328664287 is a deficient number, since it is larger than the sum of its proper divisors (46952049).

328664287 is an equidigital number, since it uses as much as digits as its factorization.

328664287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46952048.

The product of its digits is 774144, while the sum is 46.

The square root of 328664287 is about 18129.1005568395. The cubic root of 328664287 is about 690.1087044306.

The spelling of 328664287 in words is "three hundred twenty-eight million, six hundred sixty-four thousand, two hundred eighty-seven".