309198 has 16 divisors (see below), whose sum is σ = 640080. Its totient is φ = 99456.

The previous prime is 309193. The next prime is 309223. The reversal of 309198 is 891903.

It is a happy number.

It is a nialpdrome in base 13.

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 309198.

It is not an unprimeable number, because it can be changed into a prime (309193) by changing a digit.

309198 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 7 ways as a sum of consecutive naturals, for example, 715 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (40005).

2³⁰⁹¹⁹⁸ is an apocalyptic number.

309198 is an abundant number, since it is smaller than the sum of its proper divisors (330882).

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

309198 is a wasteful number, since it uses less digits than its factorization.

309198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 309198 is about 556.0557526004. The cubic root of 309198 is about 67.6205800813.

The spelling of 309198 in words is "three hundred nine thousand, one hundred ninety-eight".