1444140885 has 64 divisors (see below), whose sum is σ = 2664529920. Its totient is φ = 660545280.

The previous prime is 1444140881. The next prime is 1444140911. The reversal of 1444140885 is 5880414441.

It is a happy number.

It is not a de Polignac number, because 1444140885 - 2² = 1444140881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444140881) 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 63 ways as a sum of consecutive naturals, for example, 867564 + ... + 869226.

It is an arithmetic number, because the mean of its divisors is an integer number (41633280).

Almost surely, 2^1444140885 is an apocalyptic number.

1444140885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1444140885 is a deficient number, since it is larger than the sum of its proper divisors (1220389035).

1444140885 is a wasteful number, since it uses less digits than its factorization.

1444140885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 1444140885 is about 38001.8537047866. The cubic root of 1444140885 is about 1130.3246215393.

The spelling of 1444140885 in words is "one billion, four hundred forty-four million, one hundred forty thousand, eight hundred eighty-five".