111440 has 40 divisors (see below), whose sum is σ = 297600. Its totient is φ = 38016.

The previous prime is 111439. The next prime is 111443. The reversal of 111440 is 44111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461 + ... + 659.

It is an arithmetic number, because the mean of its divisors is an integer number (7440).

2¹¹¹⁴⁴⁰ is an apocalyptic number.

111440 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 111440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148800).

111440 is an abundant number, since it is smaller than the sum of its proper divisors (186160).

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

111440 is a wasteful number, since it uses less digits than its factorization.

111440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 111440 is about 333.8263021393. The cubic root of 111440 is about 48.1223729381.

Adding to 111440 its reverse (44111), we get a palindrome (155551).

The spelling of 111440 in words is "one hundred eleven thousand, four hundred forty", and thus it is an iban number.