1288222772 has 6 divisors (see below), whose sum is σ = 2254389858. Its totient is φ = 644111384.

The previous prime is 1288222739. The next prime is 1288222777. The reversal of 1288222772 is 2772228821.

It can be written as a sum of positive squares in only one way, i.e., 988725136 + 299497636 = 31444^2 + 17306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288222777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161027843 + ... + 161027850.

It is an arithmetic number, because the mean of its divisors is an integer number (375731643).

Almost surely, 2^1288222772 is an apocalyptic number.

It is an amenable number.

1288222772 is a deficient number, since it is larger than the sum of its proper divisors (966167086).

1288222772 is a wasteful number, since it uses less digits than its factorization.

1288222772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322055697 (or 322055695 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 1288222772 is about 35891.8204052121. The cubic root of 1288222772 is about 1088.0870895631.

The spelling of 1288222772 in words is "one billion, two hundred eighty-eight million, two hundred twenty-two thousand, seven hundred seventy-two".