550400 has 60 divisors (see below), whose sum is σ = 1395372. Its totient is φ = 215040.

The previous prime is 550379. The next prime is 550427. The reversal of 550400 is 4055.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12779 + ... + 12821.

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).

550400 is an abundant number, since it is smaller than the sum of its proper divisors (844972).

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 sum of its prime factors is 71 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 550400 is about 741.8894796397. The cubic root of 550400 is about 81.9519845807.

Adding to 550400 its reverse (4055), we get a palindrome (554455).

It can be divided in two parts, 5 and 50400, that added together give a palindrome (50405).

The spelling of 550400 in words is "five hundred fifty thousand, four hundred".