3873218 has 4 divisors (see below), whose sum is σ = 5809830. Its totient is φ = 1936608.

The previous prime is 3873209. The next prime is 3873239. The reversal of 3873218 is 8123783.

3873218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8123783 = 673 ⋅12071.

It can be written as a sum of positive squares in only one way, i.e., 3775249 + 97969 = 1943^2 + 313^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 968303 + ... + 968306.

Almost surely, 2^3873218 is an apocalyptic number.

3873218 is a deficient number, since it is larger than the sum of its proper divisors (1936612).

3873218 is a wasteful number, since it uses less digits than its factorization.

3873218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936611.

The product of its digits is 8064, while the sum is 32.

The square root of 3873218 is about 1968.0492880007. The cubic root of 3873218 is about 157.0449517652.

The spelling of 3873218 in words is "three million, eight hundred seventy-three thousand, two hundred eighteen".