223567728 has 80 divisors (see below), whose sum is σ = 623531520. Its totient is φ = 68814592.

The previous prime is 223567723. The next prime is 223567759. The reversal of 223567728 is 827765322.

It is a self number, because there is not a number n which added to its sum of digits gives 223567728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223567723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28525 + ... + 35507.

It is an arithmetic number, because the mean of its divisors is an integer number (7794144).

Almost surely, 2^223567728 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 223567728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311765760).

223567728 is an abundant number, since it is smaller than the sum of its proper divisors (399963792).

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

223567728 is a wasteful number, since it uses less digits than its factorization.

223567728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7046 (or 7040 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 223567728 is about 14952.1813793172. The cubic root of 223567728 is about 606.9268784046.

The spelling of 223567728 in words is "two hundred twenty-three million, five hundred sixty-seven thousand, seven hundred twenty-eight".