1223628 has 36 divisors (see below), whose sum is σ = 3322872. Its totient is φ = 349440.

The previous prime is 1223603. The next prime is 1223633. The reversal of 1223628 is 8263221.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1223598 and 1223607.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 453 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (92302).

2^1223628 is an apocalyptic number.

It is an amenable number.

1223628 is an abundant number, since it is smaller than the sum of its proper divisors (2099244).

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

1223628 is a wasteful number, since it uses less digits than its factorization.

1223628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102 (or 2093 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 1223628 is about 1106.1772009945. The cubic root of 1223628 is about 106.9587869347.

Adding to 1223628 its reverse (8263221), we get a palindrome (9486849).

The spelling of 1223628 in words is "one million, two hundred twenty-three thousand, six hundred twenty-eight".