109838 has 4 divisors (see below), whose sum is σ = 164760. Its totient is φ = 54918.

The previous prime is 109831. The next prime is 109841. The reversal of 109838 is 838901.

It is a happy number.

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

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109831) by changing a digit.

109838 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, 27458 + ... + 27461.

It is an arithmetic number, because the mean of its divisors is an integer number (41190).

2¹⁰⁹⁸³⁸ is an apocalyptic number.

109838 is a deficient number, since it is larger than the sum of its proper divisors (54922).

109838 is an equidigital number, since it uses as much as digits as its factorization.

109838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54921.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 109838 is about 331.4181648613. The cubic root of 109838 is about 47.8906654986.

The spelling of 109838 in words is "one hundred nine thousand, eight hundred thirty-eight".