993838 has 4 divisors (see below), whose sum is σ = 1490760. Its totient is φ = 496918.

The previous prime is 993827. The next prime is 993841. The reversal of 993838 is 838399.

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 993838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248458 + ... + 248461.

It is an arithmetic number, because the mean of its divisors is an integer number (372690).

2⁹⁹³⁸³⁸ is an apocalyptic number.

993838 is a deficient number, since it is larger than the sum of its proper divisors (496922).

993838 is a wasteful number, since it uses less digits than its factorization.

993838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496921.

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

The square root of 993838 is about 996.9142390396. The cubic root of 993838 is about 99.7941766582.

The spelling of 993838 in words is "nine hundred ninety-three thousand, eight hundred thirty-eight".