3218386 has 4 divisors (see below), whose sum is σ = 4827582. Its totient is φ = 1609192.

The previous prime is 3218357. The next prime is 3218399. The reversal of 3218386 is 6838123.

3218386 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.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 1515361 = 1305^2 + 1231^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 804595 + ... + 804598.

Almost surely, 2^3218386 is an apocalyptic number.

3218386 is a deficient number, since it is larger than the sum of its proper divisors (1609196).

3218386 is a wasteful number, since it uses less digits than its factorization.

3218386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609195.

The product of its digits is 6912, while the sum is 31.

The square root of 3218386 is about 1793.9860646059. The cubic root of 3218386 is about 147.6429486530.

The spelling of 3218386 in words is "three million, two hundred eighteen thousand, three hundred eighty-six".