328409187 has 8 divisors (see below), whose sum is σ = 440410704. Its totient is φ = 217673568.

The previous prime is 328409131. The next prime is 328409197. The reversal of 328409187 is 781904823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 328409187 - 2¹⁶ = 328343651 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (328409197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315868 + ... + 316905.

It is an arithmetic number, because the mean of its divisors is an integer number (55051338).

Almost surely, 2^328409187 is an apocalyptic number.

328409187 is a deficient number, since it is larger than the sum of its proper divisors (112001517).

328409187 is a wasteful number, since it uses less digits than its factorization.

328409187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632949.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 328409187 is about 18122.0635414403. The cubic root of 328409187 is about 689.9301105435.

The spelling of 328409187 in words is "three hundred twenty-eight million, four hundred nine thousand, one hundred eighty-seven".