3685218 has 16 divisors (see below), whose sum is σ = 7608576. Its totient is φ = 1188720.

The previous prime is 3685211. The next prime is 3685219. The reversal of 3685218 is 8125863.

It is a happy number.

3685218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3685211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9721 + ... + 10092.

It is an arithmetic number, because the mean of its divisors is an integer number (475536).

Almost surely, 2^3685218 is an apocalyptic number.

3685218 is an abundant number, since it is smaller than the sum of its proper divisors (3923358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3685218 is a wasteful number, since it uses less digits than its factorization.

3685218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19849.

The product of its digits is 11520, while the sum is 33.

The square root of 3685218 is about 1919.6921628219. The cubic root of 3685218 is about 154.4617892330.

The spelling of 3685218 in words is "three million, six hundred eighty-five thousand, two hundred eighteen".