2728979 has 4 divisors (see below), whose sum is σ = 2977080. Its totient is φ = 2480880.

The previous prime is 2728967. The next prime is 2728981. The reversal of 2728979 is 9798272.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728939) 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, 124034 + ... + 124055.

It is an arithmetic number, because the mean of its divisors is an integer number (744270).

2^2728979 is an apocalyptic number.

2728979 is a deficient number, since it is larger than the sum of its proper divisors (248101).

2728979 is a wasteful number, since it uses less digits than its factorization.

2728979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248100.

The product of its digits is 127008, while the sum is 44.

The square root of 2728979 is about 1651.9621666370. The cubic root of 2728979 is about 139.7440732550.

The spelling of 2728979 in words is "two million, seven hundred twenty-eight thousand, nine hundred seventy-nine".