505444 has 12 divisors (see below), whose sum is σ = 936684. Its totient is φ = 237824.

The previous prime is 505429. The next prime is 505447. The reversal of 505444 is 444505.

It can be written as a sum of positive squares in 2 ways, for example, as 191844 + 313600 = 438^2 + 560^2 .

It is not an unprimeable number, because it can be changed into a prime (505447) by changing a digit.

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, 3649 + ... + 3784.

It is an arithmetic number, because the mean of its divisors is an integer number (78057).

2⁵⁰⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

505444 is a deficient number, since it is larger than the sum of its proper divisors (431240).

505444 is a wasteful number, since it uses less digits than its factorization.

505444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454 (or 7452 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 505444 is about 710.9458488521. The cubic root of 505444 is about 79.6570737872.

Adding to 505444 its reverse (444505), we get a palindrome (949949).

It can be divided in two parts, 505 and 444, that added together give a palindrome (949).

The spelling of 505444 in words is "five hundred five thousand, four hundred forty-four".