1118388222 has 80 divisors (see below), whose sum is σ = 3014816640. Its totient is φ = 302715792.

The previous prime is 1118388221. The next prime is 1118388253. The reversal of 1118388222 is 2228838111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118388221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4408 + ... + 47499.

It is an arithmetic number, because the mean of its divisors is an integer number (37685208).

Almost surely, 2^1118388222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118388222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1507408320).

1118388222 is an abundant number, since it is smaller than the sum of its proper divisors (1896428418).

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

1118388222 is a wasteful number, since it uses less digits than its factorization.

1118388222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51947 (or 51938 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 1118388222 is about 33442.3118519040. The cubic root of 1118388222 is about 1038.0004176549. Note that the first 3 decimals are identical.

The spelling of 1118388222 in words is "one billion, one hundred eighteen million, three hundred eighty-eight thousand, two hundred twenty-two".