222972728 has 32 divisors (see below), whose sum is σ = 457576560. Its totient is φ = 101018880.

The previous prime is 222972713. The next prime is 222972769. The reversal of 222972728 is 827279222.

It is a happy number.

222972728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 23900 + ... + 31892.

Almost surely, 2^222972728 is an apocalyptic number.

It is an amenable number.

222972728 is an abundant number, since it is smaller than the sum of its proper divisors (234603832).

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

222972728 is a wasteful number, since it uses less digits than its factorization.

222972728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327 (or 8323 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 222972728 is about 14932.2713610489. The cubic root of 222972728 is about 606.3879778343.

The spelling of 222972728 in words is "two hundred twenty-two million, nine hundred seventy-two thousand, seven hundred twenty-eight".