1123243200 has 378 divisors, whose sum is σ = 4184353836. Its totient is φ = 296732160.

The previous prime is 1123243171. The next prime is 1123243211. The reversal of 1123243200 is 23423211.

1123243200 is a `hidden beast` number, since 1 + 1 + 232 + 432 + 0 + 0 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 10497547 + ... + 10497653.

Almost surely, 2^1123243200 is an apocalyptic number.

1123243200 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 1123243200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092176918).

1123243200 is an abundant number, since it is smaller than the sum of its proper divisors (3061110636).

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

1123243200 is an frugal number, since it uses more digits than its factorization.

1123243200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1123243200 is about 33514.8206022351. The cubic root of 1123243200 is about 1039.5002529937.

Adding to 1123243200 its reverse (23423211), we get a palindrome (1146666411).

The spelling of 1123243200 in words is "one billion, one hundred twenty-three million, two hundred forty-three thousand, two hundred".