2728704169 has 3 divisors (see below), whose sum is σ = 2728756407. Its totient is φ = 2728651932.

The previous prime is 2728704151. The next prime is 2728704179. The reversal of 2728704169 is 9614078272.

The square root of 2728704169 is 52237.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1065043225 + 1663660944 = 32635^2 + 40788^2 .

It is not a de Polignac number, because 2728704169 - 2⁵ = 2728704137 is a prime.

It is a super-2 number, since 2×2728704169² = 14891652883835961122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728704179) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26119 + ... + 78355.

It is an arithmetic number, because the mean of its divisors is an integer number (909585469).

Almost surely, 2^2728704169 is an apocalyptic number.

2728704169 is the 52237-th square number.

2728704169 is the 26119-th centered octagonal number.

It is an amenable number.

2728704169 is a deficient number, since it is larger than the sum of its proper divisors (52238).

2728704169 is an frugal number, since it uses more digits than its factorization.

2728704169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104474 (or 52237 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The cubic root of 2728704169 is about 1397.3938196535.

The spelling of 2728704169 in words is "two billion, seven hundred twenty-eight million, seven hundred four thousand, one hundred sixty-nine".