2728939 has 2 divisors, whose sum is σ = 2728940. Its totient is φ = 2728938.

The previous prime is 2728933. The next prime is 2728967. The reversal of 2728939 is 9398272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2728939 - 2³ = 2728931 is a prime.

It is not a weakly prime, because it can be changed into another prime (2728931) 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 as a sum of consecutive naturals, namely, 1364469 + 1364470.

It is an arithmetic number, because the mean of its divisors is an integer number (1364470).

2^2728939 is an apocalyptic number.

2728939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728939 is an equidigital number, since it uses as much as digits as its factorization.

2728939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 2728939 is about 1651.9500597778. The cubic root of 2728939 is about 139.7433904856.

The spelling of 2728939 in words is "two million, seven hundred twenty-eight thousand, nine hundred thirty-nine".