309944194 has 8 divisors (see below), whose sum is σ = 531332928. Its totient is φ = 132833220.

The previous prime is 309944189. The next prime is 309944209. The reversal of 309944194 is 491449903.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 309944194.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11069422 + ... + 11069449.

It is an arithmetic number, because the mean of its divisors is an integer number (66416616).

Almost surely, 2^309944194 is an apocalyptic number.

309944194 is a deficient number, since it is larger than the sum of its proper divisors (221388734).

309944194 is a wasteful number, since it uses less digits than its factorization.

309944194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22138880.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 309944194 is about 17605.2320064235. The cubic root of 309944194 is about 676.7493310104.

The spelling of 309944194 in words is "three hundred nine million, nine hundred forty-four thousand, one hundred ninety-four".