1123003200 has 168 divisors, whose sum is σ = 4019519520. Its totient is φ = 272230400.

The previous prime is 1123003183. The next prime is 1123003213. The reversal of 1123003200 is 23003211.

It is a happy number.

It is a super-2 number, since 2×1123003200² = 2522272374420480000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 42166 + ... + 63434.

Almost surely, 2^1123003200 is an apocalyptic number.

1123003200 is a gapful number since it is divisible by the number (10) 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 1123003200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009759760).

1123003200 is an abundant number, since it is smaller than the sum of its proper divisors (2896516320).

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

1123003200 is a wasteful number, since it uses less digits than its factorization.

1123003200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21305 (or 21290 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1123003200 is about 33511.2399054407. The cubic root of 1123003200 is about 1039.4262120880.

Adding to 1123003200 its reverse (23003211), we get a palindrome (1146006411).

The spelling of 1123003200 in words is "one billion, one hundred twenty-three million, three thousand, two hundred".