328991109 has 8 divisors (see below), whose sum is σ = 453780960. Its totient is φ = 211764336.

The previous prime is 328991077. The next prime is 328991111. The reversal of 328991109 is 901199823.

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

It is not a de Polignac number, because 328991109 - 2⁵ = 328991077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328991129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890667 + ... + 1890840.

It is an arithmetic number, because the mean of its divisors is an integer number (56722620).

Almost surely, 2^328991109 is an apocalyptic number.

It is an amenable number.

328991109 is a deficient number, since it is larger than the sum of its proper divisors (124789851).

328991109 is a wasteful number, since it uses less digits than its factorization.

328991109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781539.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 328991109 is about 18138.1120572126. The cubic root of 328991109 is about 690.3373754461.

The spelling of 328991109 in words is "three hundred twenty-eight million, nine hundred ninety-one thousand, one hundred nine".