1138281222 has 64 divisors (see below), whose sum is σ = 2606123520. Its totient is φ = 328541184.

The previous prime is 1138281181. The next prime is 1138281259. The reversal of 1138281222 is 2221828311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138281222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148918 + ... + 156374.

It is an arithmetic number, because the mean of its divisors is an integer number (40720680).

Almost surely, 2^1138281222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138281222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303061760).

1138281222 is an abundant number, since it is smaller than the sum of its proper divisors (1467842298).

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

1138281222 is a wasteful number, since it uses less digits than its factorization.

1138281222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597.

The product of its digits is 3072, while the sum is 30.

The square root of 1138281222 is about 33738.4235257073. The cubic root of 1138281222 is about 1044.1186595358.

The spelling of 1138281222 in words is "one billion, one hundred thirty-eight million, two hundred eighty-one thousand, two hundred twenty-two".