1444444445 has 4 divisors (see below), whose sum is σ = 1733333340. Its totient is φ = 1155555552.

The previous prime is 1444444439. The next prime is 1444444447. The reversal of 1444444445 is 5444444441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5444444441 = 43 ⋅126614987.

It can be written as a sum of positive squares in 2 ways, for example, as 407797636 + 1036646809 = 20194^2 + 32197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444444445 - 2⁶ = 1444444381 is a prime.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1444444399 and 1444444408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444444447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144444440 + ... + 144444449.

It is an arithmetic number, because the mean of its divisors is an integer number (433333335).

Almost surely, 2^1444444445 is an apocalyptic number.

It is an amenable number.

1444444445 is a deficient number, since it is larger than the sum of its proper divisors (288888895).

1444444445 is an equidigital number, since it uses as much as digits as its factorization.

1444444445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288888894.

The product of its digits is 327680, while the sum is 38.

The square root of 1444444445 is about 38005.8475106134. The cubic root of 1444444445 is about 1130.4038144830.

Adding to 1444444445 its reverse (5444444441), we get a palindrome (6888888886).

The spelling of 1444444445 in words is "one billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-five".