222389388 has 120 divisors (see below), whose sum is σ = 643462512. Its totient is φ = 66531456.

The previous prime is 222389339. The next prime is 222389407. The reversal of 222389388 is 883983222.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 155131 + ... + 156557.

Almost surely, 2^222389388 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 222389388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321731256).

222389388 is an abundant number, since it is smaller than the sum of its proper divisors (421073124).

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

222389388 is a wasteful number, since it uses less digits than its factorization.

222389388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493 (or 1482 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 222389388 is about 14912.7257065903. The cubic root of 222389388 is about 605.8587063981.

It can be divided in two parts, 22238 and 9388, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 222389388 in words is "two hundred twenty-two million, three hundred eighty-nine thousand, three hundred eighty-eight".