328789993 has 8 divisors (see below), whose sum is σ = 376333760. Its totient is φ = 281389680.

The previous prime is 328789987. The next prime is 328790009. The reversal of 328789993 is 399987823.

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

It is a cyclic number.

It is not a de Polignac number, because 328789993 - 2²¹ = 326692841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328789933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30903 + ... + 40156.

It is an arithmetic number, because the mean of its divisors is an integer number (47041720).

Almost surely, 2^328789993 is an apocalyptic number.

It is an amenable number.

328789993 is a deficient number, since it is larger than the sum of its proper divisors (47543767).

328789993 is an equidigital number, since it uses as much as digits as its factorization.

328789993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71727.

The product of its digits is 5878656, while the sum is 58.

The square root of 328789993 is about 18132.5671927612. The cubic root of 328789993 is about 690.1966764135.

It can be divided in two parts, 328 and 789993, that added together give a square (790321 = 889²).

The spelling of 328789993 in words is "three hundred twenty-eight million, seven hundred eighty-nine thousand, nine hundred ninety-three".