2728667 has 4 divisors (see below), whose sum is σ = 2766120. Its totient is φ = 2691216.

The previous prime is 2728657. The next prime is 2728669. The reversal of 2728667 is 7668272.

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

It is a cyclic number.

It is not a de Polignac number, because 2728667 - 2⁶ = 2728603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2728667.

It is not an unprimeable number, because it can be changed into a prime (2728669) 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, 18617 + ... + 18762.

It is an arithmetic number, because the mean of its divisors is an integer number (691530).

2^2728667 is an apocalyptic number.

2728667 is a deficient number, since it is larger than the sum of its proper divisors (37453).

2728667 is an equidigital number, since it uses as much as digits as its factorization.

2728667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37452.

The product of its digits is 56448, while the sum is 38.

The square root of 2728667 is about 1651.8677307823. The cubic root of 2728667 is about 139.7387474766.

The spelling of 2728667 in words is "two million, seven hundred twenty-eight thousand, six hundred sixty-seven".