1128222 has 32 divisors (see below), whose sum is σ = 2656800. Its totient is φ = 353664.

The previous prime is 1128209. The next prime is 1128223. The reversal of 1128222 is 2228211.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1128195 and 1128204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304 + ... + 1532.

It is an arithmetic number, because the mean of its divisors is an integer number (83025).

2^1128222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328400).

1128222 is an abundant number, since it is smaller than the sum of its proper divisors (1528578).

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

1128222 is a wasteful number, since it uses less digits than its factorization.

1128222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1251 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1128222 is about 1062.1779511927. The cubic root of 1128222 is about 104.1033858494.

The spelling of 1128222 in words is "one million, one hundred twenty-eight thousand, two hundred twenty-two".