1213242444 has 18 divisors (see below), whose sum is σ = 3066807380. Its totient is φ = 404414136.

The previous prime is 1213242419. The next prime is 1213242487. The reversal of 1213242444 is 4442423121.

1213242444 is a `hidden beast` number, since 1 + 213 + 2 + 4 + 2 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16850554 + ... + 16850625.

Almost surely, 2^1213242444 is an apocalyptic number.

It is an amenable number.

1213242444 is an abundant number, since it is smaller than the sum of its proper divisors (1853564936).

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

1213242444 is a wasteful number, since it uses less digits than its factorization.

1213242444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33701189 (or 33701184 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 1213242444 is about 34831.6299360222. The cubic root of 1213242444 is about 1066.5532213117.

Adding to 1213242444 its reverse (4442423121), we get a palindrome (5655665565).

The spelling of 1213242444 in words is "one billion, two hundred thirteen million, two hundred forty-two thousand, four hundred forty-four".