3918218 has 16 divisors (see below), whose sum is σ = 6256320. Its totient is φ = 1835136.

The previous prime is 3918209. The next prime is 3918251. The reversal of 3918218 is 8128193.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3155 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (391020).

Almost surely, 2^3918218 is an apocalyptic number.

3918218 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3918218 is a deficient number, since it is larger than the sum of its proper divisors (2338102).

3918218 is a wasteful number, since it uses less digits than its factorization.

3918218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181.

The product of its digits is 3456, while the sum is 32.

The square root of 3918218 is about 1979.4489132079. The cubic root of 3918218 is about 157.6508070964.

The spelling of 3918218 in words is "three million, nine hundred eighteen thousand, two hundred eighteen".