99816 has 16 divisors (see below), whose sum is σ = 249600. Its totient is φ = 33264.

The previous prime is 99809. The next prime is 99817. The reversal of 99816 is 61899.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (15600).

2⁹⁹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

99816 is an abundant number, since it is smaller than the sum of its proper divisors (149784).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124800).

99816 is a wasteful number, since it uses less digits than its factorization.

99816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4164 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 99816 is about 315.9367025212. The cubic root of 99816 is about 46.3874024461.

The spelling of 99816 in words is "ninety-nine thousand, eight hundred sixteen".