1444636389 has 16 divisors (see below), whose sum is σ = 2201962112. Its totient is φ = 825277248.

The previous prime is 1444636381. The next prime is 1444636393. The reversal of 1444636389 is 9836364441.

It is not a de Polignac number, because 1444636389 - 2³ = 1444636381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444636381) 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 15 ways as a sum of consecutive naturals, for example, 93927 + ... + 108219.

It is an arithmetic number, because the mean of its divisors is an integer number (137622632).

Almost surely, 2^1444636389 is an apocalyptic number.

It is an amenable number.

1444636389 is a deficient number, since it is larger than the sum of its proper divisors (757325723).

1444636389 is a wasteful number, since it uses less digits than its factorization.

1444636389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19116.

The product of its digits is 1492992, while the sum is 48.

The square root of 1444636389 is about 38008.3726170958. The cubic root of 1444636389 is about 1130.4538832413.

The spelling of 1444636389 in words is "one billion, four hundred forty-four million, six hundred thirty-six thousand, three hundred eighty-nine".