1028109185 has 8 divisors (see below), whose sum is σ = 1234000320. Its totient is φ = 822307824.

The previous prime is 1028109169. The next prime is 1028109193. The reversal of 1028109185 is 5819018201.

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 1028109185 - 2⁴ = 1028109169 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6044 + ... + 45746.

It is an arithmetic number, because the mean of its divisors is an integer number (154250040).

Almost surely, 2^1028109185 is an apocalyptic number.

It is an amenable number.

1028109185 is a deficient number, since it is larger than the sum of its proper divisors (205891135).

1028109185 is an equidigital number, since it uses as much as digits as its factorization.

1028109185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44887.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 1028109185 is about 32064.1417318474. The cubic root of 1028109185 is about 1009.2832823269.

The spelling of 1028109185 in words is "one billion, twenty-eight million, one hundred nine thousand, one hundred eighty-five".