309906346 has 8 divisors (see below), whose sum is σ = 465815520. Its totient is φ = 154634508.

The previous prime is 309906329. The next prime is 309906353. The reversal of 309906346 is 643609903.

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

It is a junction number, because it is equal to n+sod(n) for n = 309906299 and 309906308.

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, 158116 + ... + 160063.

It is an arithmetic number, because the mean of its divisors is an integer number (58226940).

Almost surely, 2^309906346 is an apocalyptic number.

309906346 is a deficient number, since it is larger than the sum of its proper divisors (155909174).

309906346 is a wasteful number, since it uses less digits than its factorization.

309906346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318668.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 309906346 is about 17604.1570658751. The cubic root of 309906346 is about 676.7217834155.

The spelling of 309906346 in words is "three hundred nine million, nine hundred six thousand, three hundred forty-six".