222994728 has 128 divisors (see below), whose sum is σ = 681984000. Its totient is φ = 66951360.

The previous prime is 222994727. The next prime is 222994753. The reversal of 222994728 is 827499222.

222994728 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 not an unprimeable number, because it can be changed into a prime (222994721) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 301383 + ... + 302121.

It is an arithmetic number, because the mean of its divisors is an integer number (5328000).

Almost surely, 2^222994728 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 222994728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340992000).

222994728 is an abundant number, since it is smaller than the sum of its proper divisors (458989272).

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

222994728 is a wasteful number, since it uses less digits than its factorization.

222994728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 882 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 222994728 is about 14933.0080024086. The cubic root of 222994728 is about 606.4079206272.

The spelling of 222994728 in words is "two hundred twenty-two million, nine hundred ninety-four thousand, seven hundred twenty-eight".