111355398 has 160 divisors (see below), whose sum is σ = 317813760. Its totient is φ = 28304640.

The previous prime is 111355393. The next prime is 111355399. The reversal of 111355398 is 893553111.

111355398 is a `hidden beast` number, since 1 + 1 + 13 + 553 + 98 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111355393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 985390 + ... + 985502.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^111355398 is an apocalyptic number.

111355398 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 111355398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158906880).

111355398 is an abundant number, since it is smaller than the sum of its proper divisors (206458362).

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

111355398 is a wasteful number, since it uses less digits than its factorization.

111355398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 215 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 111355398 is about 10552.5067164158. The cubic root of 111355398 is about 481.1019215412.

The spelling of 111355398 in words is "one hundred eleven million, three hundred fifty-five thousand, three hundred ninety-eight".