550644 has 12 divisors (see below), whose sum is σ = 1284864. Its totient is φ = 183544.

The previous prime is 550637. The next prime is 550651. The reversal of 550644 is 446055.

550644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (550637) and next prime (550651).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

550644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22932 + ... + 22955.

It is an arithmetic number, because the mean of its divisors is an integer number (107072).

2⁵⁵⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

550644 is an abundant number, since it is smaller than the sum of its proper divisors (734220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550644 is a wasteful number, since it uses less digits than its factorization.

550644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45894 (or 45892 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 550644 is about 742.0539063976. The cubic root of 550644 is about 81.9640929444.

Adding to 550644 its reverse (446055), we get a palindrome (996699).

The spelling of 550644 in words is "five hundred fifty thousand, six hundred forty-four".