109816 has 32 divisors (see below), whose sum is σ = 246240. Its totient is φ = 44928.

The previous prime is 109807. The next prime is 109819. The reversal of 109816 is 618901.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109819) by changing a digit.

109816 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 in 7 ways as a sum of consecutive naturals, for example, 2046 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (7695).

2¹⁰⁹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123120).

109816 is an abundant number, since it is smaller than the sum of its proper divisors (136424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109816 is a wasteful number, since it uses less digits than its factorization.

109816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 109816 is about 331.3849725018. The cubic root of 109816 is about 47.8874678651.

The spelling of 109816 in words is "one hundred nine thousand, eight hundred sixteen".