1441981138 has 8 divisors (see below), whose sum is σ = 2329354188. Its totient is φ = 665529744.

The previous prime is 1441981133. The next prime is 1441981147. The reversal of 1441981138 is 8311891441.

It can be written as a sum of positive squares in 2 ways, for example, as 1391812249 + 50168889 = 37307^2 + 7083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1441981138.

It is not an unprimeable number, because it can be changed into a prime (1441981133) 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, 27730381 + ... + 27730432.

Almost surely, 2^1441981138 is an apocalyptic number.

1441981138 is a deficient number, since it is larger than the sum of its proper divisors (887373050).

1441981138 is a wasteful number, since it uses less digits than its factorization.

1441981138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55460828.

The product of its digits is 27648, while the sum is 40.

The square root of 1441981138 is about 37973.4267350209. The cubic root of 1441981138 is about 1129.7608646342.

The spelling of 1441981138 in words is "one billion, four hundred forty-one million, nine hundred eighty-one thousand, one hundred thirty-eight".