2685809 has 8 divisors (see below), whose sum is σ = 3168768. Its totient is φ = 2227680.

The previous prime is 2685803. The next prime is 2685817. The reversal of 2685809 is 9085862.

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

It is not a de Polignac number, because 2685809 - 2¹² = 2681713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2685803) 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, 5972 + ... + 6405.

It is an arithmetic number, because the mean of its divisors is an integer number (396096).

2^2685809 is an apocalyptic number.

It is an amenable number.

2685809 is a deficient number, since it is larger than the sum of its proper divisors (482959).

2685809 is a wasteful number, since it uses less digits than its factorization.

2685809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12415.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2685809 is about 1638.8437997564. The cubic root of 2685809 is about 139.0032778759.

The spelling of 2685809 in words is "two million, six hundred eighty-five thousand, eight hundred nine".