1320228 has 108 divisors (see below), whose sum is σ = 4263168. Its totient is φ = 336960.

The previous prime is 1320211. The next prime is 1320247. The reversal of 1320228 is 8220231.

It is a happy number.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42573 + ... + 42603.

2^1320228 is an apocalyptic number.

1320228 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 1320228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131584).

1320228 is an abundant number, since it is smaller than the sum of its proper divisors (2942940).

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

1320228 is a wasteful number, since it uses less digits than its factorization.

1320228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1320228 is about 1149.0117492872. The cubic root of 1320228 is about 109.7024465229.

Adding to 1320228 its reverse (8220231), we get a palindrome (9540459).

The spelling of 1320228 in words is "one million, three hundred twenty thousand, two hundred twenty-eight".