3128273730640 has 40 divisors (see below), whose sum is σ = 7274580100200. Its totient is φ = 1251078322176.

The previous prime is 3128273730563. The next prime is 3128273730661. The reversal of 3128273730640 is 460373728213.

3128273730640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 109103374864 + 3019170355776 = 330308^2 + 1737576^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3175965 + ... + 4042684.

It is an arithmetic number, because the mean of its divisors is an integer number (181864502505).

Almost surely, 2^{3128273730640} is an apocalyptic number.

It is an amenable number.

3128273730640 is an abundant number, since it is smaller than the sum of its proper divisors (4146306369560).

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

3128273730640 is a wasteful number, since it uses less digits than its factorization.

3128273730640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7224079 (or 7224073 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 3128273730640 in words is "three trillion, one hundred twenty-eight billion, two hundred seventy-three million, seven hundred thirty thousand, six hundred forty".