2728195321 has 4 divisors (see below), whose sum is σ = 2728462672. Its totient is φ = 2727927972.

The previous prime is 2728195307. The next prime is 2728195339. The reversal of 2728195321 is 1235918272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2728195321 - 2⁵ = 2728195289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728195621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117735 + ... + 138988.

It is an arithmetic number, because the mean of its divisors is an integer number (682115668).

Almost surely, 2^2728195321 is an apocalyptic number.

It is an amenable number.

2728195321 is a deficient number, since it is larger than the sum of its proper divisors (267351).

2728195321 is a wasteful number, since it uses less digits than its factorization.

2728195321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267350.

The product of its digits is 60480, while the sum is 40.

The square root of 2728195321 is about 52232.1292022449. The cubic root of 2728195321 is about 1397.3069523824.

The spelling of 2728195321 in words is "two billion, seven hundred twenty-eight million, one hundred ninety-five thousand, three hundred twenty-one".