1218838 has 8 divisors (see below), whose sum is σ = 1845360. Its totient is φ = 603720.

The previous prime is 1218829. The next prime is 1218853. The reversal of 1218838 is 8388121.

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

It is a congruent number.

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, 2578 + ... + 3013.

It is an arithmetic number, because the mean of its divisors is an integer number (230670).

2^1218838 is an apocalyptic number.

1218838 is a deficient number, since it is larger than the sum of its proper divisors (626522).

1218838 is a wasteful number, since it uses less digits than its factorization.

1218838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702.

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

The square root of 1218838 is about 1104.0099637232. The cubic root of 1218838 is about 106.8190378795.

The spelling of 1218838 in words is "one million, two hundred eighteen thousand, eight hundred thirty-eight".