222638238 has 48 divisors (see below), whose sum is σ = 510553680. Its totient is φ = 69921792.

The previous prime is 222638237. The next prime is 222638243. The reversal of 222638238 is 832836222.

222638238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222638237) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 64320 + ... + 67692.

It is an arithmetic number, because the mean of its divisors is an integer number (10636535).

Almost surely, 2^222638238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222638238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255276840).

222638238 is an abundant number, since it is smaller than the sum of its proper divisors (287915442).

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

222638238 is a wasteful number, since it uses less digits than its factorization.

222638238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593 (or 3590 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 222638238 is about 14921.0669189572. The cubic root of 222638238 is about 606.0846040751.

The spelling of 222638238 in words is "two hundred twenty-two million, six hundred thirty-eight thousand, two hundred thirty-eight".