3128852789 has 4 divisors (see below), whose sum is σ = 3133719456. Its totient is φ = 3123986124.

The previous prime is 3128852767. The next prime is 3128852801. The reversal of 3128852789 is 9872588213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9872588213 = 103 ⋅95850371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128852789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3128852789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3128855789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2432369 + ... + 2433654.

It is an arithmetic number, because the mean of its divisors is an integer number (783429864).

Almost surely, 2^3128852789 is an apocalyptic number.

It is an amenable number.

3128852789 is a deficient number, since it is larger than the sum of its proper divisors (4866667).

3128852789 is an equidigital number, since it uses as much as digits as its factorization.

3128852789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866666.

The product of its digits is 1935360, while the sum is 53.

The square root of 3128852789 is about 55936.1492149755. The cubic root of 3128852789 is about 1462.6094556013.

The spelling of 3128852789 in words is "three billion, one hundred twenty-eight million, eight hundred fifty-two thousand, seven hundred eighty-nine".