328395987 has 24 divisors (see below), whose sum is σ = 505951056. Its totient is φ = 204535296.

The previous prime is 328395983. The next prime is 328396043. The reversal of 328395987 is 789593823.

It is a happy number.

It is not a de Polignac number, because 328395987 - 2² = 328395983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328395983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13128 + ... + 28794.

It is an arithmetic number, because the mean of its divisors is an integer number (21081294).

Almost surely, 2^328395987 is an apocalyptic number.

328395987 is a deficient number, since it is larger than the sum of its proper divisors (177555069).

328395987 is a wasteful number, since it uses less digits than its factorization.

328395987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15827 (or 15824 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 328395987 is about 18121.6993408455. The cubic root of 328395987 is about 689.9208667913.

The spelling of 328395987 in words is "three hundred twenty-eight million, three hundred ninety-five thousand, nine hundred eighty-seven".