1320304580728 has 32 divisors (see below), whose sum is σ = 2889420364800. Its totient is φ = 553805567712.

The previous prime is 1320304580689. The next prime is 1320304580731. The reversal of 1320304580728 is 8270854030231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250815108 + ... + 250820371.

It is an arithmetic number, because the mean of its divisors is an integer number (90294386400).

Almost surely, 2^{1320304580728} is an apocalyptic number.

It is an amenable number.

1320304580728 is an abundant number, since it is smaller than the sum of its proper divisors (1569115784072).

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

1320304580728 is a wasteful number, since it uses less digits than its factorization.

1320304580728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501635539 (or 501635535 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 1320304580728 in words is "one trillion, three hundred twenty billion, three hundred four million, five hundred eighty thousand, seven hundred twenty-eight".