918198 has 24 divisors (see below), whose sum is σ = 2059200. Its totient is φ = 295344.

The previous prime is 918193. The next prime is 918199. The reversal of 918198 is 891819.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918198.

It is not an unprimeable number, because it can be changed into a prime (918193) by changing a digit.

918198 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (85800).

2⁹¹⁸¹⁹⁸ is an apocalyptic number.

918198 is an abundant number, since it is smaller than the sum of its proper divisors (1141002).

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

918198 is a wasteful number, since it uses less digits than its factorization.

918198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1793 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 918198 is about 958.2264867974. The cubic root of 918198 is about 97.1953409340.

The spelling of 918198 in words is "nine hundred eighteen thousand, one hundred ninety-eight".