1123917312 has 240 divisors, whose sum is σ = 3540643920. Its totient is φ = 315850752.

The previous prime is 1123917293. The next prime is 1123917343. The reversal of 1123917312 is 2137193211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123917312.

It is a congruent number.

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, 8203708 + ... + 8203844.

It is an arithmetic number, because the mean of its divisors is an integer number (14752683).

Almost surely, 2^1123917312 is an apocalyptic number.

1123917312 is a gapful number since it is divisible by the number (12) 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 1123917312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770321960).

1123917312 is an abundant number, since it is smaller than the sum of its proper divisors (2416726608).

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

1123917312 is a wasteful number, since it uses less digits than its factorization.

1123917312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 258 counting only the distinct ones).

The product of its digits is 2268, while the sum is 30.

The square root of 1123917312 is about 33524.8760176678. The cubic root of 1123917312 is about 1039.7081626903.

The spelling of 1123917312 in words is "one billion, one hundred twenty-three million, nine hundred seventeen thousand, three hundred twelve".