328999 has 6 divisors (see below), whose sum is σ = 361760. Its totient is φ = 298980.

The previous prime is 328981. The next prime is 329009. The reversal of 328999 is 999823.

It is a happy number.

It is not a de Polignac number, because 328999 - 2¹¹ = 326951 is a prime.

It is a Duffinian number.

328999 is a modest number, since divided by 999 gives 328 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1239 + ... + 1480.

2³²⁸⁹⁹⁹ is an apocalyptic number.

328999 is a deficient number, since it is larger than the sum of its proper divisors (32761).

328999 is a wasteful number, since it uses less digits than its factorization.

328999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2730 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 328999 is about 573.5843442773. The cubic root of 328999 is about 69.0342894753.

The spelling of 328999 in words is "three hundred twenty-eight thousand, nine hundred ninety-nine".