2728845 has 24 divisors (see below), whose sum is σ = 5406336. Its totient is φ = 1247328.

The previous prime is 2728841. The next prime is 2728853. The reversal of 2728845 is 5488272.

It is a happy number.

2728845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2728845 - 2² = 2728841 is a prime.

It is a Curzon number.

2728845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4017 + ... + 4646.

It is an arithmetic number, because the mean of its divisors is an integer number (225264).

2^2728845 is an apocalyptic number.

It is an amenable number.

2728845 is a deficient number, since it is larger than the sum of its proper divisors (2677491).

2728845 is a wasteful number, since it uses less digits than its factorization.

2728845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681 (or 8678 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 2728845 is about 1651.9216083095. The cubic root of 2728845 is about 139.7417859512.

The spelling of 2728845 in words is "two million, seven hundred twenty-eight thousand, eight hundred forty-five".