222529728 has 112 divisors (see below), whose sum is σ = 632033280. Its totient is φ = 68849664.

The previous prime is 222529717. The next prime is 222529733. The reversal of 222529728 is 827925222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257425 + ... + 258287.

Almost surely, 2^222529728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222529728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316016640).

222529728 is an abundant number, since it is smaller than the sum of its proper divisors (409503552).

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

222529728 is a wasteful number, since it uses less digits than its factorization.

222529728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 964 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 222529728 is about 14917.4303417177. The cubic root of 222529728 is about 605.9861230470.

The spelling of 222529728 in words is "two hundred twenty-two million, five hundred twenty-nine thousand, seven hundred twenty-eight".