1328727842 has 16 divisors (see below), whose sum is σ = 2148736632. Its totient is φ = 612593280.

The previous prime is 1328727839. The next prime is 1328727899. The reversal of 1328727842 is 2487278231.

It can be written as a sum of positive squares in 4 ways, for example, as 202521361 + 1126206481 = 14231^2 + 33559^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1328727793 and 1328727802.

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, 2909 + ... + 51632.

Almost surely, 2^1328727842 is an apocalyptic number.

1328727842 is a deficient number, since it is larger than the sum of its proper divisors (820008790).

1328727842 is a wasteful number, since it uses less digits than its factorization.

1328727842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55493.

The product of its digits is 301056, while the sum is 44.

The square root of 1328727842 is about 36451.7193284487. The cubic root of 1328727842 is about 1099.3737046375.

The spelling of 1328727842 in words is "one billion, three hundred twenty-eight million, seven hundred twenty-seven thousand, eight hundred forty-two".