393838 has 4 divisors (see below), whose sum is σ = 590760. Its totient is φ = 196918.

The previous prime is 393797. The next prime is 393847. The reversal of 393838 is 838393.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

393838 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, 98458 + ... + 98461.

It is an arithmetic number, because the mean of its divisors is an integer number (147690).

2³⁹³⁸³⁸ is an apocalyptic number.

393838 is a deficient number, since it is larger than the sum of its proper divisors (196922).

393838 is a wasteful number, since it uses less digits than its factorization.

393838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196921.

The product of its digits is 15552, while the sum is 34.

The square root of 393838 is about 627.5651360616. The cubic root of 393838 is about 73.3003203104.

The spelling of 393838 in words is "three hundred ninety-three thousand, eight hundred thirty-eight".