2728691 has 8 divisors (see below), whose sum is σ = 3171840. Its totient is φ = 2298888.

The previous prime is 2728669. The next prime is 2728703. The reversal of 2728691 is 1968272.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2728631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2891 + ... + 3716.

It is an arithmetic number, because the mean of its divisors is an integer number (396480).

2^2728691 is an apocalyptic number.

2728691 is a deficient number, since it is larger than the sum of its proper divisors (443149).

2728691 is an equidigital number, since it uses as much as digits as its factorization.

2728691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673.

The product of its digits is 12096, while the sum is 35.

The square root of 2728691 is about 1651.8749952705. The cubic root of 2728691 is about 139.7391571662.

The spelling of 2728691 in words is "two million, seven hundred twenty-eight thousand, six hundred ninety-one".