111228444 has 72 divisors (see below), whose sum is σ = 295762320. Its totient is φ = 36148896.

The previous prime is 111228443. The next prime is 111228457. The reversal of 111228444 is 444822111.

It is a super-2 number, since 2×111228444² = 24743533509322272, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111228443) 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, 199414 + ... + 199970.

It is an arithmetic number, because the mean of its divisors is an integer number (4107810).

Almost surely, 2^111228444 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 111228444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147881160).

111228444 is an abundant number, since it is smaller than the sum of its proper divisors (184533876).

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

111228444 is a wasteful number, since it uses less digits than its factorization.

111228444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 605 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 111228444 is about 10546.4896529604. The cubic root of 111228444 is about 480.9190205463.

The spelling of 111228444 in words is "one hundred eleven million, two hundred twenty-eight thousand, four hundred forty-four".