1198218 has 32 divisors (see below), whose sum is σ = 2801664. Its totient is φ = 334512.

The previous prime is 1198217. The next prime is 1198229. The reversal of 1198218 is 8128911.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1198217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1671 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (87552).

2^1198218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400832).

1198218 is an abundant number, since it is smaller than the sum of its proper divisors (1603446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1198218 is a wasteful number, since it uses less digits than its factorization.

1198218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 1152, while the sum is 30.

The square root of 1198218 is about 1094.6314448252. The cubic root of 1198218 is about 106.2132292598.

The spelling of 1198218 in words is "one million, one hundred ninety-eight thousand, two hundred eighteen".