1123240400 has 30 divisors (see below), whose sum is σ = 2698586022. Its totient is φ = 449296000.

The previous prime is 1123240373. The next prime is 1123240403. The reversal of 1123240400 is 40423211.

It can be written as a sum of positive squares in 3 ways, for example, as 93857344 + 1029383056 = 9688^2 + 32084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123240403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1403651 + ... + 1404450.

Almost surely, 2^1123240400 is an apocalyptic number.

1123240400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123240400 is an abundant number, since it is smaller than the sum of its proper divisors (1575345622).

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

1123240400 is a wasteful number, since it uses less digits than its factorization.

1123240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808119 (or 2808108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1123240400 is about 33514.7788296447. The cubic root of 1123240400 is about 1039.4993892439.

Adding to 1123240400 its reverse (40423211), we get a palindrome (1163663611).

The spelling of 1123240400 in words is "one billion, one hundred twenty-three million, two hundred forty thousand, four hundred".