2728857 has 8 divisors (see below), whose sum is σ = 3852576. Its totient is φ = 1712192.

The previous prime is 2728853. The next prime is 2728877. The reversal of 2728857 is 7588272.

2728857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2728857 - 2² = 2728853 is a prime.

2728857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2728853) 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 7 ways as a sum of consecutive naturals, for example, 26703 + ... + 26804.

It is an arithmetic number, because the mean of its divisors is an integer number (481572).

2^2728857 is an apocalyptic number.

It is an amenable number.

2728857 is a deficient number, since it is larger than the sum of its proper divisors (1123719).

2728857 is a wasteful number, since it uses less digits than its factorization.

2728857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53527.

The product of its digits is 62720, while the sum is 39.

The square root of 2728857 is about 1651.9252404392. The cubic root of 2728857 is about 139.7419907874.

The spelling of 2728857 in words is "two million, seven hundred twenty-eight thousand, eight hundred fifty-seven".