550020 has 48 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 143616.

The previous prime is 550009. The next prime is 550027. The reversal of 550020 is 20055.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 549978 and 550005.

It is not an unprimeable number, because it can be changed into a prime (550027) by changing a digit.

550020 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, 5289 + ... + 5391.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁵⁵⁰⁰²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786240).

550020 is an abundant number, since it is smaller than the sum of its proper divisors (1022460).

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

550020 is a wasteful number, since it uses less digits than its factorization.

550020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 12.

The square root of 550020 is about 741.6333325842. The cubic root of 550020 is about 81.9331201647.

Adding to 550020 its reverse (20055), we get a palindrome (570075).

The spelling of 550020 in words is "five hundred fifty thousand, twenty".