111444444 has 72 divisors (see below), whose sum is σ = 298526480. Its totient is φ = 35927712.

The previous prime is 111444439. The next prime is 111444449. The reversal of 111444444 is 444444111.

It is an interprime number because it is at equal distance from previous prime (111444439) and next prime (111444449).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111444449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667249 + ... + 667415.

Almost surely, 2^111444444 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 111444444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149263240).

111444444 is an abundant number, since it is smaller than the sum of its proper divisors (187082036).

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

111444444 is a wasteful number, since it uses less digits than its factorization.

111444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 209 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 111444444 is about 10556.7250603584. The cubic root of 111444444 is about 481.2301260360.

Adding to 111444444 its reverse (444444111), we get a palindrome (555888555).

The spelling of 111444444 in words is "one hundred eleven million, four hundred forty-four thousand, four hundred forty-four".