550044 has 48 divisors (see below), whose sum is σ = 1559040. Its totient is φ = 166320.

The previous prime is 550027. The next prime is 550049. The reversal of 550044 is 440055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 549999 and 550026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550049) by changing a digit.

550044 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 15 ways as a sum of consecutive naturals, for example, 957 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (32480).

2⁵⁵⁰⁰⁴⁴ is an apocalyptic number.

550044 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779520).

550044 is an abundant number, since it is smaller than the sum of its proper divisors (1008996).

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

550044 is a wasteful number, since it uses less digits than its factorization.

550044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 550044 is about 741.6495129102. The cubic root of 550044 is about 81.9343118585.

Adding to 550044 its reverse (440055), we get a palindrome (990099).

The spelling of 550044 in words is "five hundred fifty thousand, forty-four".