144444445 has 4 divisors (see below), whose sum is σ = 173333340. Its totient is φ = 115555552.

The previous prime is 144444437. The next prime is 144444457. The reversal of 144444445 is 544444441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544444441 = 2797 ⋅194653.

It can be written as a sum of positive squares in 2 ways, for example, as 95472441 + 48972004 = 9771^2 + 6998^2 .

It is a cyclic number.

It is not a de Polignac number, because 144444445 - 2³ = 144444437 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 144444445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14444440 + ... + 14444449.

It is an arithmetic number, because the mean of its divisors is an integer number (43333335).

Almost surely, 2^144444445 is an apocalyptic number.

It is an amenable number.

144444445 is a deficient number, since it is larger than the sum of its proper divisors (28888895).

144444445 is an equidigital number, since it uses as much as digits as its factorization.

144444445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28888894.

The product of its digits is 81920, while the sum is 34.

The square root of 144444445 is about 12018.5042746591. The cubic root of 144444445 is about 524.6869728832.

Adding to 144444445 its reverse (544444441), we get a palindrome (688888886).

The spelling of 144444445 in words is "one hundred forty-four million, four hundred forty-four thousand, four hundred forty-five".