111923838 has 48 divisors (see below), whose sum is σ = 263901456. Its totient is φ = 34076160.

The previous prime is 111923827. The next prime is 111923849. The reversal of 111923838 is 838329111.

It is an interprime number because it is at equal distance from previous prime (111923827) and next prime (111923849).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20233 + ... + 25163.

It is an arithmetic number, because the mean of its divisors is an integer number (5497947).

Almost surely, 2^111923838 is an apocalyptic number.

111923838 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 111923838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131950728).

111923838 is an abundant number, since it is smaller than the sum of its proper divisors (151977618).

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

111923838 is a wasteful number, since it uses less digits than its factorization.

111923838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049 (or 5046 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 111923838 is about 10579.4063160463. The cubic root of 111923838 is about 481.9191654070.

The spelling of 111923838 in words is "one hundred eleven million, nine hundred twenty-three thousand, eight hundred thirty-eight".