2722809 has 8 divisors (see below), whose sum is σ = 3788352. Its totient is φ = 1736240.

The previous prime is 2722801. The next prime is 2722831. The reversal of 2722809 is 9082272.

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 2722809 - 2³ = 2722801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2722801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19662 + ... + 19799.

It is an arithmetic number, because the mean of its divisors is an integer number (473544).

2^2722809 is an apocalyptic number.

It is an amenable number.

2722809 is a deficient number, since it is larger than the sum of its proper divisors (1065543).

2722809 is a wasteful number, since it uses less digits than its factorization.

2722809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39487.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2722809 is about 1650.0936337069. The cubic root of 2722809 is about 139.6386771156.

It can be divided in two parts, 272 and 2809, that added together give a triangular number (3081 = T₇₈).

The spelling of 2722809 in words is "two million, seven hundred twenty-two thousand, eight hundred nine".