2728651 has 16 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 2439360.

The previous prime is 2728643. The next prime is 2728657. The reversal of 2728651 is 1568272.

2728651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2728651 - 2³ = 2728643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728657) 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 15 ways as a sum of consecutive naturals, for example, 30615 + ... + 30703.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2^2728651 is an apocalyptic number.

2728651 is a deficient number, since it is larger than the sum of its proper divisors (312629).

2728651 is a wasteful number, since it uses less digits than its factorization.

2728651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its digits is 6720, while the sum is 31.

The square root of 2728651 is about 1651.8628877725. The cubic root of 2728651 is about 139.7384743488.

The spelling of 2728651 in words is "two million, seven hundred twenty-eight thousand, six hundred fifty-one".