163838 has 4 divisors (see below), whose sum is σ = 245760. Its totient is φ = 81918.

The previous prime is 163819. The next prime is 163841. The reversal of 163838 is 838361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838361 = 29 ⋅28909.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 163838.

It is a congruent number.

It is an unprimeable number.

163838 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, 40958 + ... + 40961.

It is an arithmetic number, because the mean of its divisors is an integer number (61440).

2¹⁶³⁸³⁸ is an apocalyptic number.

163838 is a deficient number, since it is larger than the sum of its proper divisors (81922).

163838 is an equidigital number, since it uses as much as digits as its factorization.

163838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81921.

The product of its digits is 3456, while the sum is 29.

The square root of 163838 is about 404.7690699646. The cubic root of 163838 is about 54.7190076396.

It can be divided in two parts, 163 and 838, that added together give a palindrome (1001).

The spelling of 163838 in words is "one hundred sixty-three thousand, eight hundred thirty-eight".