1222204028 has 6 divisors (see below), whose sum is σ = 2138857056. Its totient is φ = 611102012.

The previous prime is 1222204003. The next prime is 1222204037. The reversal of 1222204028 is 8204022221.

It is a junction number, because it is equal to n+sod(n) for n = 1222203994 and 1222204012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152775500 + ... + 152775507.

It is an arithmetic number, because the mean of its divisors is an integer number (356476176).

Almost surely, 2^1222204028 is an apocalyptic number.

It is an amenable number.

1222204028 is a deficient number, since it is larger than the sum of its proper divisors (916653028).

1222204028 is a wasteful number, since it uses less digits than its factorization.

1222204028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305551011 (or 305551009 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1222204028 is about 34960.0347253832. The cubic root of 1222204028 is about 1069.1728046457.

Adding to 1222204028 its reverse (8204022221), we get a palindrome (9426226249).

The spelling of 1222204028 in words is "one billion, two hundred twenty-two million, two hundred four thousand, twenty-eight".