1223028 has 36 divisors (see below), whose sum is σ = 3154788. Its totient is φ = 399360.

The previous prime is 1223021. The next prime is 1223029. The reversal of 1223028 is 8203221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 219024 = 1002^2 + 468^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1223028³ = 5488206633337553856, which contains 333 as substring.

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 1223028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1588 + ... + 2228.

It is an arithmetic number, because the mean of its divisors is an integer number (87633).

2^1223028 is an apocalyptic number.

1223028 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 1223028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577394).

1223028 is an abundant number, since it is smaller than the sum of its proper divisors (1931760).

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

1223028 is a wasteful number, since it uses less digits than its factorization.

1223028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 699 counting only the distinct ones).

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

The square root of 1223028 is about 1105.9059634526. The cubic root of 1223028 is about 106.9413018373.

Adding to 1223028 its reverse (8203221), we get a palindrome (9426249).

The spelling of 1223028 in words is "one million, two hundred twenty-three thousand, twenty-eight".