309044 has 6 divisors (see below), whose sum is σ = 540834. Its totient is φ = 154520.

The previous prime is 309037. The next prime is 309059. The reversal of 309044 is 440903.

It can be written as a sum of positive squares in only one way, i.e., 289444 + 19600 = 538^2 + 140^2 .

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 309044.

It is an unprimeable number.

309044 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38627 + ... + 38634.

It is an arithmetic number, because the mean of its divisors is an integer number (90139).

2³⁰⁹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

309044 is a deficient number, since it is larger than the sum of its proper divisors (231790).

309044 is a wasteful number, since it uses less digits than its factorization.

309044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77265 (or 77263 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 309044 is about 555.9172600307. The cubic root of 309044 is about 67.6093517868.

Adding to 309044 its reverse (440903), we get a palindrome (749947).

The spelling of 309044 in words is "three hundred nine thousand, forty-four".