545444 has 6 divisors (see below), whose sum is σ = 954534. Its totient is φ = 272720.

The previous prime is 545443. The next prime is 545449. The reversal of 545444 is 444545.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 12544 = 730^2 + 112^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 545444.

It is not an unprimeable number, because it can be changed into a prime (545443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68177 + ... + 68184.

It is an arithmetic number, because the mean of its divisors is an integer number (159089).

2⁵⁴⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

545444 is a deficient number, since it is larger than the sum of its proper divisors (409090).

545444 is a wasteful number, since it uses less digits than its factorization.

545444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136365 (or 136363 counting only the distinct ones).

The product of its digits is 6400, while the sum is 26.

The square root of 545444 is about 738.5418065350. The cubic root of 545444 is about 81.7052675125.

Adding to 545444 its reverse (444545), we get a palindrome (989989).

It can be divided in two parts, 545 and 444, that added together give a palindrome (989).

The spelling of 545444 in words is "five hundred forty-five thousand, four hundred forty-four".