Adding to 550400 its reverse (4055), we get a palindrome (554455).
It is a nialpdrome in base 16.
It is a congruent number.
It is an unprimeable number.
2550400 is an apocalyptic number.
550400 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 550400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697686).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
550400 is an equidigital number, since it uses as much as digits as its factorization.
550400 is an odious number, because the sum of its binary digits is odd.
The square root of 550400 is about 741.8894796397. The cubic root of 550400 is about 81.9519845807.
The spelling of 550400 in words is "five hundred fifty thousand, four hundred".