222985728 has 240 divisors, whose sum is σ = 762617856. Its totient is φ = 61378560.

The previous prime is 222985703. The next prime is 222985751. The reversal of 222985728 is 827589222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 999825 + ... + 1000047.

Almost surely, 2^222985728 is an apocalyptic number.

222985728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222985728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381308928).

222985728 is an abundant number, since it is smaller than the sum of its proper divisors (539632128).

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

222985728 is a wasteful number, since it uses less digits than its factorization.

222985728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 266 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 222985728 is about 14932.7066535173. The cubic root of 222985728 is about 606.3997623704.

The spelling of 222985728 in words is "two hundred twenty-two million, nine hundred eighty-five thousand, seven hundred twenty-eight".