1222614728 has 8 divisors (see below), whose sum is σ = 2292402630. Its totient is φ = 611307360.

The previous prime is 1222614709. The next prime is 1222614739. The reversal of 1222614728 is 8274162221.

It can be written as a sum of positive squares in only one way, i.e., 896523364 + 326091364 = 29942^2 + 18058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76413413 + ... + 76413428.

Almost surely, 2^1222614728 is an apocalyptic number.

It is an amenable number.

1222614728 is a deficient number, since it is larger than the sum of its proper divisors (1069787902).

1222614728 is a wasteful number, since it uses less digits than its factorization.

1222614728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152826847 (or 152826843 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 1222614728 is about 34965.9080820161. The cubic root of 1222614728 is about 1069.2925500906.

Adding to 1222614728 its reverse (8274162221), we get a palindrome (9496776949).

The spelling of 1222614728 in words is "one billion, two hundred twenty-two million, six hundred fourteen thousand, seven hundred twenty-eight".