309368 has 8 divisors (see below), whose sum is σ = 580080. Its totient is φ = 154680.

The previous prime is 309367. The next prime is 309371. The reversal of 309368 is 863903.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 309368.

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 309368.

It is not an unprimeable number, because it can be changed into a prime (309367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19328 + ... + 19343.

It is an arithmetic number, because the mean of its divisors is an integer number (72510).

2³⁰⁹³⁶⁸ is an apocalyptic number.

It is an amenable number.

309368 is a deficient number, since it is larger than the sum of its proper divisors (270712).

309368 is a wasteful number, since it uses less digits than its factorization.

309368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38677 (or 38673 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 309368 is about 556.2085939645. The cubic root of 309368 is about 67.6329706234.

The spelling of 309368 in words is "three hundred nine thousand, three hundred sixty-eight".