1218368 has 14 divisors (see below), whose sum is σ = 2417826. Its totient is φ = 609152.

The previous prime is 1218367. The next prime is 1218383. The reversal of 1218368 is 8638121.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 565504 = 808^2 + 752^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1218368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9455 + ... + 9582.

2^1218368 is an apocalyptic number.

It is an amenable number.

1218368 is a deficient number, since it is larger than the sum of its proper divisors (1199458).

1218368 is an equidigital number, since it uses as much as digits as its factorization.

1218368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19049 (or 19039 counting only the distinct ones).

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

The square root of 1218368 is about 1103.7970828010. The cubic root of 1218368 is about 106.8053058379.

The spelling of 1218368 in words is "one million, two hundred eighteen thousand, three hundred sixty-eight".