1022221788 has 24 divisors (see below), whose sum is σ = 2725924992. Its totient is φ = 292063344.

The previous prime is 1022221777. The next prime is 1022221813. The reversal of 1022221788 is 8871222201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6084570 + ... + 6084737.

It is an arithmetic number, because the mean of its divisors is an integer number (113580208).

Almost surely, 2^1022221788 is an apocalyptic number.

It is an amenable number.

1022221788 is an abundant number, since it is smaller than the sum of its proper divisors (1703703204).

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

1022221788 is a wasteful number, since it uses less digits than its factorization.

1022221788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12169321 (or 12169319 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 1022221788 is about 31972.2033647980. The cubic root of 1022221788 is about 1007.3530626162.

Adding to 1022221788 its reverse (8871222201), we get a palindrome (9893443989).

The spelling of 1022221788 in words is "one billion, twenty-two million, two hundred twenty-one thousand, seven hundred eighty-eight".