939838 has 4 divisors (see below), whose sum is σ = 1409760. Its totient is φ = 469918.

The previous prime is 939823. The next prime is 939839. The reversal of 939838 is 838939.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 939838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939839) by changing a digit.

939838 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 234958 + ... + 234961.

It is an arithmetic number, because the mean of its divisors is an integer number (352440).

2⁹³⁹⁸³⁸ is an apocalyptic number.

939838 is a deficient number, since it is larger than the sum of its proper divisors (469922).

939838 is a wasteful number, since it uses less digits than its factorization.

939838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469921.

The product of its digits is 46656, while the sum is 40.

The square root of 939838 is about 969.4524227625. The cubic root of 939838 is about 97.9529831387.

The spelling of 939838 in words is "nine hundred thirty-nine thousand, eight hundred thirty-eight".