2728215566 has 8 divisors (see below), whose sum is σ = 4094251920. Its totient is φ = 1363464928.

The previous prime is 2728215557. The next prime is 2728215569. The reversal of 2728215566 is 6655128272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728215569) 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, 316106 + ... + 324621.

It is an arithmetic number, because the mean of its divisors is an integer number (511781490).

Almost surely, 2^2728215566 is an apocalyptic number.

2728215566 is a deficient number, since it is larger than the sum of its proper divisors (1366036354).

2728215566 is a wasteful number, since it uses less digits than its factorization.

2728215566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642858.

The product of its digits is 403200, while the sum is 44.

The square root of 2728215566 is about 52232.3230002266. The cubic root of 2728215566 is about 1397.3104086854.

The spelling of 2728215566 in words is "two billion, seven hundred twenty-eight million, two hundred fifteen thousand, five hundred sixty-six".