222238128 has 120 divisors (see below), whose sum is σ = 679234800. Its totient is φ = 62415360.

The previous prime is 222238111. The next prime is 222238141. The reversal of 222238128 is 821832222.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222238095 and 222238104.

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, 142698 + ... + 144246.

It is an arithmetic number, because the mean of its divisors is an integer number (5660290).

Almost surely, 2^222238128 is an apocalyptic number.

222238128 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 222238128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339617400).

222238128 is an abundant number, since it is smaller than the sum of its proper divisors (456996672).

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

222238128 is a wasteful number, since it uses less digits than its factorization.

222238128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1622 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 222238128 is about 14907.6533364578. The cubic root of 222238128 is about 605.7213152908.

The spelling of 222238128 in words is "two hundred twenty-two million, two hundred thirty-eight thousand, one hundred twenty-eight".