111798918 has 72 divisors (see below), whose sum is σ = 304331664. Its totient is φ = 29034720.

The previous prime is 111798913. The next prime is 111798931. The reversal of 111798918 is 819897111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111798913) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11580 + ... + 18912.

Almost surely, 2^111798918 is an apocalyptic number.

111798918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111798918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152165832).

111798918 is an abundant number, since it is smaller than the sum of its proper divisors (192532746).

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

111798918 is a wasteful number, since it uses less digits than its factorization.

111798918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370 (or 7356 counting only the distinct ones).

The product of its digits is 36288, while the sum is 45.

The square root of 111798918 is about 10573.5007447865. The cubic root of 111798918 is about 481.7398060785.

The spelling of 111798918 in words is "one hundred eleven million, seven hundred ninety-eight thousand, nine hundred eighteen".