309568044 has 24 divisors (see below), whose sum is σ = 734569920. Its totient is φ = 101440144.

The previous prime is 309568033. The next prime is 309568087. The reversal of 309568044 is 440865903.

It is a junction number, because it is equal to n+sod(n) for n = 309567993 and 309568011.

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 7 ways as a sum of consecutive naturals, for example, 217914 + ... + 219329.

It is an arithmetic number, because the mean of its divisors is an integer number (30607080).

Almost surely, 2^309568044 is an apocalyptic number.

It is an amenable number.

309568044 is an abundant number, since it is smaller than the sum of its proper divisors (425001876).

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

309568044 is a wasteful number, since it uses less digits than its factorization.

309568044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437309 (or 437307 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 309568044 is about 17594.5458594418. The cubic root of 309568044 is about 676.4754512675.

The spelling of 309568044 in words is "three hundred nine million, five hundred sixty-eight thousand, forty-four".