1444445889 has 8 divisors (see below), whose sum is σ = 1926128160. Its totient is φ = 962863776.

The previous prime is 1444445887. The next prime is 1444445897. The reversal of 1444445889 is 9885444441.

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

It is not a de Polignac number, because 1444445889 - 2¹ = 1444445887 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1444445887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20389 + ... + 57485.

It is an arithmetic number, because the mean of its divisors is an integer number (240766020).

Almost surely, 2^1444445889 is an apocalyptic number.

It is an amenable number.

1444445889 is a deficient number, since it is larger than the sum of its proper divisors (481682271).

1444445889 is a wasteful number, since it uses less digits than its factorization.

1444445889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50079.

The product of its digits is 2949120, while the sum is 51.

The square root of 1444445889 is about 38005.8665076854. The cubic root of 1444445889 is about 1130.4041911682.

The spelling of 1444445889 in words is "one billion, four hundred forty-four million, four hundred forty-five thousand, eight hundred eighty-nine".