12444452228 has 18 divisors (see below), whose sum is σ = 23581870074. Its totient is φ = 5743593024.

The previous prime is 12444452219. The next prime is 12444452257. The reversal of 12444452228 is 82225444421.

It can be written as a sum of positive squares in 3 ways, for example, as 148303684 + 12296148544 = 12178^2 + 110888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12444452191 and 12444452200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9203801 + ... + 9205152.

It is an arithmetic number, because the mean of its divisors is an integer number (1310103893).

Almost surely, 2^12444452228 is an apocalyptic number.

It is an amenable number.

12444452228 is a deficient number, since it is larger than the sum of its proper divisors (11137417846).

12444452228 is a wasteful number, since it uses less digits than its factorization.

12444452228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18408983 (or 18408968 counting only the distinct ones).

The product of its digits is 163840, while the sum is 38.

Adding to 12444452228 its reverse (82225444421), we get a palindrome (94669896649).

The spelling of 12444452228 in words is "twelve billion, four hundred forty-four million, four hundred fifty-two thousand, two hundred twenty-eight".