12198918 has 16 divisors (see below), whose sum is σ = 24575040. Its totient is φ = 4036776.

The previous prime is 12198917. The next prime is 12198919. The reversal of 12198918 is 81989121.

It is an interprime number because it is at equal distance from previous prime (12198917) and next prime (12198919).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12198913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6480 + ... + 8147.

It is an arithmetic number, because the mean of its divisors is an integer number (1535940).

Almost surely, 2^12198918 is an apocalyptic number.

12198918 is an abundant number, since it is smaller than the sum of its proper divisors (12376122).

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

12198918 is a wasteful number, since it uses less digits than its factorization.

12198918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14771.

The product of its digits is 10368, while the sum is 39.

The square root of 12198918 is about 3492.6949480308. The cubic root of 12198918 is about 230.2009459998.

The spelling of 12198918 in words is "twelve million, one hundred ninety-eight thousand, nine hundred eighteen".