309938 has 8 divisors (see below), whose sum is σ = 480000. Its totient is φ = 149940.

The previous prime is 309937. The next prime is 309977. The reversal of 309938 is 839903.

309938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (309931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2438 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (60000).

2³⁰⁹⁹³⁸ is an apocalyptic number.

309938 is a deficient number, since it is larger than the sum of its proper divisors (170062).

309938 is a wasteful number, since it uses less digits than its factorization.

309938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 309938 is about 556.7207558552. The cubic root of 309938 is about 67.6744822873.

The spelling of 309938 in words is "three hundred nine thousand, nine hundred thirty-eight".