444444888889 has 3 divisors (see below), whose sum is σ = 444445555557. Its totient is φ = 444444222222.

The previous prime is 444444888827. The next prime is 444444888911. The reversal of 444444888889 is 988888444444.

The square root of 444444888889 is 666667.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 444444888889 - 2²⁹ = 443908017977 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (444444880889) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 333334 + ... + 1000000.

It is an arithmetic number, because the mean of its divisors is an integer number (148148518519).

Almost surely, 2^444444888889 is an apocalyptic number.

444444888889 is the 666667-th square number.

444444888889 is the 333334-th centered octagonal number.

It is an amenable number.

444444888889 is a deficient number, since it is larger than the sum of its proper divisors (666668).

444444888889 is an frugal number, since it uses more digits than its factorization.

444444888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333334 (or 666667 counting only the distinct ones).

The product of its digits is 1207959552, while the sum is 73.

The spelling of 444444888889 in words is "four hundred forty-four billion, four hundred forty-four million, eight hundred eighty-eight thousand, eight hundred eighty-nine".