3881218 has 8 divisors (see below), whose sum is σ = 6351120. Its totient is φ = 1764180.

The previous prime is 3881209. The next prime is 3881221. The reversal of 3881218 is 8121883.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3881218.

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, 88188 + ... + 88231.

It is an arithmetic number, because the mean of its divisors is an integer number (793890).

Almost surely, 2^3881218 is an apocalyptic number.

3881218 is a deficient number, since it is larger than the sum of its proper divisors (2469902).

3881218 is a wasteful number, since it uses less digits than its factorization.

3881218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176432.

The product of its digits is 3072, while the sum is 31.

The square root of 3881218 is about 1970.0807090066. The cubic root of 3881218 is about 157.1530010768.

It can be divided in two parts, 388121 and 8, that added together give a square (388129 = 623²).

The spelling of 3881218 in words is "three million, eight hundred eighty-one thousand, two hundred eighteen".