2306809 has 8 divisors (see below), whose sum is σ = 2442240. Its totient is φ = 2172816.

The previous prime is 2306797. The next prime is 2306851. The reversal of 2306809 is 9086032.

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 2306809 - 2¹⁷ = 2175737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2306309) 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, 5832 + ... + 6214.

It is an arithmetic number, because the mean of its divisors is an integer number (305280).

2^2306809 is an apocalyptic number.

It is an amenable number.

2306809 is a deficient number, since it is larger than the sum of its proper divisors (135431).

2306809 is a wasteful number, since it uses less digits than its factorization.

2306809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2306809 is about 1518.8182906457. The cubic root of 2306809 is about 132.1307435833.

The spelling of 2306809 in words is "two million, three hundred six thousand, eight hundred nine".