1123389288 has 144 divisors (see below), whose sum is σ = 3725748000. Its totient is φ = 304057152.

The previous prime is 1123389287. The next prime is 1123389331. The reversal of 1123389288 is 8829833211.

It is a happy number.

1123389288 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 33517²-1.

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

It is not an unprimeable number, because it can be changed into a prime (1123389287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 58653 + ... + 75411.

It is an arithmetic number, because the mean of its divisors is an integer number (25873250).

Almost surely, 2^1123389288 is an apocalyptic number.

1123389288 is a gapful number since it is divisible by the number (18) 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 1123389288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862874000).

1123389288 is an abundant number, since it is smaller than the sum of its proper divisors (2602358712).

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

1123389288 is a wasteful number, since it uses less digits than its factorization.

1123389288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16804 (or 16790 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1123389288 is about 33516.9999850822. Note that the first 4 decimals coincide. The cubic root of 1123389288 is about 1039.5453165293.

The spelling of 1123389288 in words is "one billion, one hundred twenty-three million, three hundred eighty-nine thousand, two hundred eighty-eight".