1386218 has 8 divisors (see below), whose sum is σ = 2123712. Its totient is φ = 678316.

The previous prime is 1386211. The next prime is 1386223. The reversal of 1386218 is 8126831.

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

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1386211) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7280 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (265464).

2^1386218 is an apocalyptic number.

1386218 is a deficient number, since it is larger than the sum of its proper divisors (737494).

1386218 is a wasteful number, since it uses less digits than its factorization.

1386218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14796.

The product of its digits is 2304, while the sum is 29.

The square root of 1386218 is about 1177.3775944870. The cubic root of 1386218 is about 111.5005932121.

The spelling of 1386218 in words is "one million, three hundred eighty-six thousand, two hundred eighteen".