3687218 has 8 divisors (see below), whose sum is σ = 5571612. Its totient is φ = 1830016.

The previous prime is 3687209. The next prime is 3687227. The reversal of 3687218 is 8127863.

It is an interprime number because it is at equal distance from previous prime (3687209) and next prime (3687227).

It can be written as a sum of positive squares in 2 ways, for example, as 3052009 + 635209 = 1747^2 + 797^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6455 + ... + 7002.

Almost surely, 2^3687218 is an apocalyptic number.

3687218 is a deficient number, since it is larger than the sum of its proper divisors (1884394).

3687218 is a wasteful number, since it uses less digits than its factorization.

3687218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596.

The product of its digits is 16128, while the sum is 35.

The square root of 3687218 is about 1920.2130090175. The cubic root of 3687218 is about 154.4897267671.

The spelling of 3687218 in words is "three million, six hundred eighty-seven thousand, two hundred eighteen".