3128972873 has 16 divisors (see below), whose sum is σ = 3463225920. Its totient is φ = 2808679104.

The previous prime is 3128972849. The next prime is 3128972881. The reversal of 3128972873 is 3782798213.

It is a cyclic number.

It is not a de Polignac number, because 3128972873 - 2⁸ = 3128972617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128972813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115790 + ... + 140232.

It is an arithmetic number, because the mean of its divisors is an integer number (216451620).

Almost surely, 2^3128972873 is an apocalyptic number.

It is an amenable number.

3128972873 is a deficient number, since it is larger than the sum of its proper divisors (334253047).

3128972873 is a wasteful number, since it uses less digits than its factorization.

3128972873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24728.

The product of its digits is 1016064, while the sum is 50.

The square root of 3128972873 is about 55937.2226071334. Note that the first 3 decimals coincide. The cubic root of 3128972873 is about 1462.6281667987.

The spelling of 3128972873 in words is "three billion, one hundred twenty-eight million, nine hundred seventy-two thousand, eight hundred seventy-three".