328987 has 4 divisors (see below), whose sum is σ = 330480. Its totient is φ = 327496.

The previous prime is 328981. The next prime is 329009. The reversal of 328987 is 789823.

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 328987 - 2¹¹ = 326939 is a prime.

It is a Duffinian number.

328987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (328981) 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, 343 + ... + 880.

It is an arithmetic number, because the mean of its divisors is an integer number (82620).

2³²⁸⁹⁸⁷ is an apocalyptic number.

328987 is a deficient number, since it is larger than the sum of its proper divisors (1493).

328987 is a wasteful number, since it uses less digits than its factorization.

328987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its digits is 24192, while the sum is 37.

The square root of 328987 is about 573.5738836453. The cubic root of 328987 is about 69.0334501399.

The spelling of 328987 in words is "three hundred twenty-eight thousand, nine hundred eighty-seven".