111917868 has 48 divisors (see below), whose sum is σ = 280433664. Its totient is φ = 34612480.

The previous prime is 111917849. The next prime is 111917909. The reversal of 111917868 is 868719111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10621 + ... + 18347.

It is an arithmetic number, because the mean of its divisors is an integer number (5842368).

Almost surely, 2^111917868 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 111917868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140216832).

111917868 is an abundant number, since it is smaller than the sum of its proper divisors (168515796).

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

111917868 is a wasteful number, since it uses less digits than its factorization.

111917868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822 (or 7820 counting only the distinct ones).

The product of its digits is 24192, while the sum is 42.

The square root of 111917868 is about 10579.1241603452. The cubic root of 111917868 is about 481.9105967570.

The spelling of 111917868 in words is "one hundred eleven million, nine hundred seventeen thousand, eight hundred sixty-eight".