1123805200 has 120 divisors (see below), whose sum is σ = 3149004800. Its totient is φ = 385257600.

The previous prime is 1123805197. The next prime is 1123805209. The reversal of 1123805200 is 25083211.

It is not an unprimeable number, because it can be changed into a prime (1123805209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133105 + ... + 141295.

Almost surely, 2^1123805200 is an apocalyptic number.

1123805200 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 1123805200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574502400).

1123805200 is an abundant number, since it is smaller than the sum of its proper divisors (2025199600).

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

1123805200 is an equidigital number, since it uses as much as digits as its factorization.

1123805200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230 (or 8205 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1123805200 is about 33523.2039041617. The cubic root of 1123805200 is about 1039.6735908595.

Adding to 1123805200 its reverse (25083211), we get a palindrome (1148888411).

The spelling of 1123805200 in words is "one billion, one hundred twenty-three million, eight hundred five thousand, two hundred".