12309198 has 32 divisors (see below), whose sum is σ = 26980992. Its totient is φ = 3712800.

The previous prime is 12309191. The next prime is 12309233. The reversal of 12309198 is 89190321.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27565 + ... + 28007.

It is an arithmetic number, because the mean of its divisors is an integer number (843156).

Almost surely, 2^12309198 is an apocalyptic number.

12309198 is an abundant number, since it is smaller than the sum of its proper divisors (14671794).

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

12309198 is a wasteful number, since it uses less digits than its factorization.

12309198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12309198 is about 3508.4466648362. The cubic root of 12309198 is about 230.8925494908.

The spelling of 12309198 in words is "twelve million, three hundred nine thousand, one hundred ninety-eight".