550800 has 150 divisors (see below), whose sum is σ = 2093058. Its totient is φ = 138240.

The previous prime is 550789. The next prime is 550801. The reversal of 550800 is 8055.

It can be written as a sum of positive squares in 3 ways, for example, as 82944 + 467856 = 288^2 + 684^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (550801) by changing a digit.

550800 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 29 ways as a sum of consecutive naturals, for example, 32392 + ... + 32408.

2⁵⁵⁰⁸⁰⁰ is an apocalyptic number.

550800 is a gapful number since it is divisible by the number (50) 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 550800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046529).

550800 is an abundant number, since it is smaller than the sum of its proper divisors (1542258).

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

550800 is a wasteful number, since it uses less digits than its factorization.

550800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 550800 is about 742.1590126112. The cubic root of 550800 is about 81.9718324828.

Adding to 550800 its reverse (8055), we get a palindrome (558855).

It can be divided in two parts, 5 and 50800, that added together give a palindrome (50805).

The spelling of 550800 in words is "five hundred fifty thousand, eight hundred".