2208685 has 4 divisors (see below), whose sum is σ = 2650428. Its totient is φ = 1766944.

The previous prime is 2208683. The next prime is 2208697. The reversal of 2208685 is 5868022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1687401 + 521284 = 1299^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2208685 - 2¹ = 2208683 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2208683) 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, 220864 + ... + 220873.

It is an arithmetic number, because the mean of its divisors is an integer number (662607).

2^2208685 is an apocalyptic number.

It is an amenable number.

2208685 is a deficient number, since it is larger than the sum of its proper divisors (441743).

2208685 is an equidigital number, since it uses as much as digits as its factorization.

2208685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441742.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2208685 is about 1486.1645265582. The cubic root of 2208685 is about 130.2300659760.

The spelling of 2208685 in words is "two million, two hundred eight thousand, six hundred eighty-five".