3640218 has 16 divisors (see below), whose sum is σ = 7381056. Its totient is φ = 1196640.

The previous prime is 3640207. The next prime is 3640223. The reversal of 3640218 is 8120463.

It is a happy number.

It is an unprimeable number.

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, 3718 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (461316).

Almost surely, 2^3640218 is an apocalyptic number.

3640218 is an abundant number, since it is smaller than the sum of its proper divisors (3740838).

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

3640218 is a wasteful number, since it uses less digits than its factorization.

3640218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8389.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 3640218 is about 1907.9355335021. The cubic root of 3640218 is about 153.8305044723.

The spelling of 3640218 in words is "three million, six hundred forty thousand, two hundred eighteen".