2728649284 has 12 divisors (see below), whose sum is σ = 4787167084. Its totient is φ = 1360887264.

The previous prime is 2728649281. The next prime is 2728649317. The reversal of 2728649284 is 4829468272.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2221048384 + 507600900 = 47128^2 + 22530^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2728649281) 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 3 ways as a sum of consecutive naturals, for example, 857559 + ... + 860734.

Almost surely, 2^2728649284 is an apocalyptic number.

It is an amenable number.

2728649284 is a deficient number, since it is larger than the sum of its proper divisors (2058517800).

2728649284 is a wasteful number, since it uses less digits than its factorization.

2728649284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718694 (or 1718692 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 52.

The square root of 2728649284 is about 52236.4746513392. The cubic root of 2728649284 is about 1397.3844505575.

The spelling of 2728649284 in words is "two billion, seven hundred twenty-eight million, six hundred forty-nine thousand, two hundred eighty-four".