309223146 has 8 divisors (see below), whose sum is σ = 618446304. Its totient is φ = 103074380.

The previous prime is 309223139. The next prime is 309223163. The reversal of 309223146 is 641322903.

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

309223146 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25768590 + ... + 25768601.

It is an arithmetic number, because the mean of its divisors is an integer number (77305788).

Almost surely, 2^309223146 is an apocalyptic number.

309223146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

309223146 is a wasteful number, since it uses less digits than its factorization.

309223146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51537196.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 309223146 is about 17584.7418519579. The cubic root of 309223146 is about 676.2241314732.

The spelling of 309223146 in words is "three hundred nine million, two hundred twenty-three thousand, one hundred forty-six".