328089889 has 4 divisors (see below), whose sum is σ = 328129924. Its totient is φ = 328049856.

The previous prime is 328089869. The next prime is 328089899. The reversal of 328089889 is 988980823.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988980823 = 29 ⋅34102787.

It can be written as a sum of positive squares in 2 ways, for example, as 111999889 + 216090000 = 10583^2 + 14700^2 .

It is a cyclic number.

It is not a de Polignac number, because 328089889 - 2⁵ = 328089857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328089809) 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 3 ways as a sum of consecutive naturals, for example, 2772 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (82032481).

Almost surely, 2^328089889 is an apocalyptic number.

It is an amenable number.

328089889 is a deficient number, since it is larger than the sum of its proper divisors (40035).

328089889 is a wasteful number, since it uses less digits than its factorization.

328089889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40034.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The square root of 328089889 is about 18113.2517511351. The cubic root of 328089889 is about 689.7064416719.

The spelling of 328089889 in words is "three hundred twenty-eight million, eighty-nine thousand, eight hundred eighty-nine".