309844 has 12 divisors (see below), whose sum is σ = 550368. Its totient is φ = 152600.

The previous prime is 309823. The next prime is 309851. The reversal of 309844 is 448903.

It is a congruent number.

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, 262 + ... + 829.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2³⁰⁹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

309844 is a deficient number, since it is larger than the sum of its proper divisors (240524).

309844 is a wasteful number, since it uses less digits than its factorization.

309844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 309844 is about 556.6363265185. The cubic root of 309844 is about 67.6676400107.

The spelling of 309844 in words is "three hundred nine thousand, eight hundred forty-four".