1143621444 has 48 divisors (see below), whose sum is σ = 3051417600. Its totient is φ = 326560416.

The previous prime is 1143621389. The next prime is 1143621481. The reversal of 1143621444 is 4441263411.

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 15 ways as a sum of consecutive naturals, for example, 213997 + ... + 219275.

It is an arithmetic number, because the mean of its divisors is an integer number (63571200).

Almost surely, 2^1143621444 is an apocalyptic number.

1143621444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1143621444 is an abundant number, since it is smaller than the sum of its proper divisors (1907796156).

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

1143621444 is a wasteful number, since it uses less digits than its factorization.

1143621444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872 (or 7870 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 1143621444 is about 33817.4724661675. The cubic root of 1143621444 is about 1045.7489328410.

Adding to 1143621444 its reverse (4441263411), we get a palindrome (5584884855).

The spelling of 1143621444 in words is "one billion, one hundred forty-three million, six hundred twenty-one thousand, four hundred forty-four".