1218844 has 12 divisors (see below), whose sum is σ = 2326968. Its totient is φ = 554000.

The previous prime is 1218829. The next prime is 1218853. The reversal of 1218844 is 4488121.

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, 13807 + ... + 13894.

It is an arithmetic number, because the mean of its divisors is an integer number (193914).

2^1218844 is an apocalyptic number.

It is an amenable number.

1218844 is a deficient number, since it is larger than the sum of its proper divisors (1108124).

1218844 is a wasteful number, since it uses less digits than its factorization.

1218844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27716 (or 27714 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 1218844 is about 1104.0126810866. The cubic root of 1218844 is about 106.8192131593.

Subtracting from 1218844 its sum of digits (28), we obtain a square (1218816 = 1104²).

It can be divided in two parts, 12 and 18844, that multiplied together give a triangular number (226128 = T₆₇₂).

The spelling of 1218844 in words is "one million, two hundred eighteen thousand, eight hundred forty-four".