111138380 has 48 divisors (see below), whose sum is σ = 242234496. Its totient is φ = 42796800.

The previous prime is 111138361. The next prime is 111138389. The reversal of 111138380 is 83831111.

It is not an unprimeable number, because it can be changed into a prime (111138389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73997 + ... + 75483.

It is an arithmetic number, because the mean of its divisors is an integer number (5046552).

Almost surely, 2^111138380 is an apocalyptic number.

111138380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111138380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121117248).

111138380 is an abundant number, since it is smaller than the sum of its proper divisors (131096116).

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

111138380 is a wasteful number, since it uses less digits than its factorization.

111138380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 111138380 is about 10542.2189315153. The cubic root of 111138380 is about 480.7891820955.

Adding to 111138380 its reverse (83831111), we get a palindrome (194969491).

The spelling of 111138380 in words is "one hundred eleven million, one hundred thirty-eight thousand, three hundred eighty".