3128797687944 has 16 divisors (see below), whose sum is σ = 7821994219920. Its totient is φ = 1042932562640.

The previous prime is 3128797687943. The next prime is 3128797687969. The reversal of 3128797687944 is 4497867978213.

It is not an unprimeable number, because it can be changed into a prime (3128797687943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65183285142 + ... + 65183285189.

It is an arithmetic number, because the mean of its divisors is an integer number (488874638745).

Almost surely, 2^{3128797687944} is an apocalyptic number.

It is an amenable number.

3128797687944 is an abundant number, since it is smaller than the sum of its proper divisors (4693196531976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3128797687944 is a wasteful number, since it uses less digits than its factorization.

3128797687944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130366570340 (or 130366570336 counting only the distinct ones).

The product of its digits is 1024192512, while the sum is 75.

The spelling of 3128797687944 in words is "three trillion, one hundred twenty-eight billion, seven hundred ninety-seven million, six hundred eighty-seven thousand, nine hundred forty-four".