550320 has 40 divisors (see below), whose sum is σ = 1706736. Its totient is φ = 146688.

The previous prime is 550309. The next prime is 550337. The reversal of 550320 is 23055.

550320 = T₇₅ + T₇₆ + ... + T₁₅₄.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 550320.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 550320.

It is an unprimeable number.

550320 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 7 ways as a sum of consecutive naturals, for example, 907 + ... + 1386.

2⁵⁵⁰³²⁰ is an apocalyptic number.

It is an amenable number.

550320 is an abundant number, since it is smaller than the sum of its proper divisors (1156416).

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

550320 is a wasteful number, since it uses less digits than its factorization.

550320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 550320 is about 741.8355612937. The cubic root of 550320 is about 81.9480138465.

Adding to 550320 its reverse (23055), we get a palindrome (573375).

The spelling of 550320 in words is "five hundred fifty thousand, three hundred twenty".