222429728 has 12 divisors (see below), whose sum is σ = 437908590. Its totient is φ = 111214848.

The previous prime is 222429679. The next prime is 222429731. The reversal of 222429728 is 827924222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 179238544 + 43191184 = 13388^2 + 6572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222429691 and 222429700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3475433 + ... + 3475496.

Almost surely, 2^222429728 is an apocalyptic number.

It is an amenable number.

222429728 is a deficient number, since it is larger than the sum of its proper divisors (215478862).

222429728 is an equidigital number, since it uses as much as digits as its factorization.

222429728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6950939 (or 6950931 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 222429728 is about 14914.0781813694. The cubic root of 222429728 is about 605.8953371367.

The spelling of 222429728 in words is "two hundred twenty-two million, four hundred twenty-nine thousand, seven hundred twenty-eight".