222897428 has 12 divisors (see below), whose sum is σ = 420076020. Its totient is φ = 102875712.

The previous prime is 222897419. The next prime is 222897449. The reversal of 222897428 is 824798222.

222897428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 82664464 + 140232964 = 9092^2 + 11842^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143193 + ... + 2143296.

It is an arithmetic number, because the mean of its divisors is an integer number (35006335).

Almost surely, 2^222897428 is an apocalyptic number.

It is an amenable number.

222897428 is a deficient number, since it is larger than the sum of its proper divisors (197178592).

222897428 is a wasteful number, since it uses less digits than its factorization.

222897428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286506 (or 4286504 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 222897428 is about 14929.7497634756. The cubic root of 222897428 is about 606.3197091628.

The spelling of 222897428 in words is "two hundred twenty-two million, eight hundred ninety-seven thousand, four hundred twenty-eight".