1112001228 has 72 divisors (see below), whose sum is σ = 3041731056. Its totient is φ = 340502400.

The previous prime is 1112001227. The next prime is 1112001257. The reversal of 1112001228 is 8221002111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1112001228.

It is not an unprimeable number, because it can be changed into a prime (1112001227) 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, 93118 + ... + 104378.

Almost surely, 2^1112001228 is an apocalyptic number.

1112001228 is a gapful number since it is divisible by the number (18) 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 1112001228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520865528).

1112001228 is an abundant number, since it is smaller than the sum of its proper divisors (1929729828).

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

1112001228 is a wasteful number, since it uses less digits than its factorization.

1112001228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495 (or 11490 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1112001228 is about 33346.6824136975. The cubic root of 1112001228 is about 1036.0206748407.

Adding to 1112001228 its reverse (8221002111), we get a palindrome (9333003339).

The spelling of 1112001228 in words is "one billion, one hundred twelve million, one thousand, two hundred twenty-eight".