111109986 has 96 divisors (see below), whose sum is σ = 277717440. Its totient is φ = 31819392.

The previous prime is 111109981. The next prime is 111109997. The reversal of 111109986 is 689901111.

It is a self number, because there is not a number n which added to its sum of digits gives 111109986.

It is not an unprimeable number, because it can be changed into a prime (111109981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297696 + ... + 298068.

It is an arithmetic number, because the mean of its divisors is an integer number (2892890).

Almost surely, 2^111109986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111109986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138858720).

111109986 is an abundant number, since it is smaller than the sum of its proper divisors (166607454).

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

111109986 is a wasteful number, since it uses less digits than its factorization.

111109986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 36.

The square root of 111109986 is about 10540.8721650535. The cubic root of 111109986 is about 480.7482340726.

The spelling of 111109986 in words is "one hundred eleven million, one hundred nine thousand, nine hundred eighty-six".