3129728944 has 20 divisors (see below), whose sum is σ = 6383000440. Its totient is φ = 1482503040.

The previous prime is 3129728911. The next prime is 3129729037. The reversal of 3129728944 is 4498279213.

It is a super-2 number, since 2×3129728944² = 19590406525822710272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5147277 + ... + 5147884.

It is an arithmetic number, because the mean of its divisors is an integer number (319150022).

Almost surely, 2^3129728944 is an apocalyptic number.

It is an amenable number.

3129728944 is an abundant number, since it is smaller than the sum of its proper divisors (3253271496).

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

3129728944 is a wasteful number, since it uses less digits than its factorization.

3129728944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10295188 (or 10295182 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 3129728944 is about 55943.9804089770. The cubic root of 3129728944 is about 1462.7459649524.

The spelling of 3129728944 in words is "three billion, one hundred twenty-nine million, seven hundred twenty-eight thousand, nine hundred forty-four".