3128205568 has 36 divisors (see below), whose sum is σ = 6253683408. Its totient is φ = 1561725440.

The previous prime is 3128205541. The next prime is 3128205569. The reversal of 3128205568 is 8655028213.

It is a self number, because there is not a number n which added to its sum of digits gives 3128205568.

It is not an unprimeable number, because it can be changed into a prime (3128205569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165903 + ... + 183793.

It is an arithmetic number, because the mean of its divisors is an integer number (173713428).

Almost surely, 2^3128205568 is an apocalyptic number.

It is an amenable number.

3128205568 is a deficient number, since it is larger than the sum of its proper divisors (3125477840).

3128205568 is an equidigital number, since it uses as much as digits as its factorization.

3128205568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18590 (or 18576 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 3128205568 is about 55930.3635604132. The cubic root of 3128205568 is about 1462.5085989511.

The spelling of 3128205568 in words is "three billion, one hundred twenty-eight million, two hundred five thousand, five hundred sixty-eight".