309136198 has 24 divisors (see below), whose sum is σ = 540069984. Its totient is φ = 132325200.

The previous prime is 309136189. The next prime is 309136229. The reversal of 309136198 is 891631903.

309136198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 309136198.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114403 + ... + 117073.

It is an arithmetic number, because the mean of its divisors is an integer number (22502916).

Almost surely, 2^309136198 is an apocalyptic number.

309136198 is a deficient number, since it is larger than the sum of its proper divisors (230933786).

309136198 is a wasteful number, since it uses less digits than its factorization.

309136198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 309136198 is about 17582.2694212095. The cubic root of 309136198 is about 676.1607448346.

The spelling of 309136198 in words is "three hundred nine million, one hundred thirty-six thousand, one hundred ninety-eight".