111144440 has 128 divisors (see below), whose sum is σ = 286856640. Its totient is φ = 38400000.

The previous prime is 111144413. The next prime is 111144457. The reversal of 111144440 is 44441111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1100390 + ... + 1100490.

Almost surely, 2^111144440 is an apocalyptic number.

111144440 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 111144440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143428320).

111144440 is an abundant number, since it is smaller than the sum of its proper divisors (175712200).

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

111144440 is a wasteful number, since it uses less digits than its factorization.

111144440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 111144440 is about 10542.5063433702. The cubic root of 111144440 is about 480.7979205394.

Adding to 111144440 its reverse (44441111), we get a palindrome (155585551).

The spelling of 111144440 in words is "one hundred eleven million, one hundred forty-four thousand, four hundred forty".