1223544040 has 16 divisors (see below), whose sum is σ = 2752974180. Its totient is φ = 489417600.

The previous prime is 1223544031. The next prime is 1223544073. The reversal of 1223544040 is 404453221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1205617284 + 17926756 = 34722^2 + 4234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1223543996 and 1223544014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15294261 + ... + 15294340.

Almost surely, 2^1223544040 is an apocalyptic number.

1223544040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223544040 is an abundant number, since it is smaller than the sum of its proper divisors (1529430140).

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

1223544040 is a wasteful number, since it uses less digits than its factorization.

1223544040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30588612 (or 30588608 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1223544040 is about 34979.1943875213. The cubic root of 1223544040 is about 1069.5634053074.

Adding to 1223544040 its reverse (404453221), we get a palindrome (1627997261).

The spelling of 1223544040 in words is "one billion, two hundred twenty-three million, five hundred forty-four thousand, forty".