1243016444 has 12 divisors (see below), whose sum is σ = 2250288600. Its totient is φ = 600076848.

The previous prime is 1243016441. The next prime is 1243016471. The reversal of 1243016444 is 4446103421.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243016441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357714 + ... + 5357945.

It is an arithmetic number, because the mean of its divisors is an integer number (187524050).

Almost surely, 2^1243016444 is an apocalyptic number.

It is an amenable number.

1243016444 is a deficient number, since it is larger than the sum of its proper divisors (1007272156).

1243016444 is a wasteful number, since it uses less digits than its factorization.

1243016444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715692 (or 10715690 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1243016444 is about 35256.4383340121. The cubic root of 1243016444 is about 1075.2075154466.

Adding to 1243016444 its reverse (4446103421), we get a palindrome (5689119865).

The spelling of 1243016444 in words is "one billion, two hundred forty-three million, sixteen thousand, four hundred forty-four".