549220 has 24 divisors (see below), whose sum is σ = 1318464. Its totient is φ = 188256.

The previous prime is 549203. The next prime is 549221. The reversal of 549220 is 22945.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 549191 and 549200.

It is not an unprimeable number, because it can be changed into a prime (549221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1822 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (54936).

2⁵⁴⁹²²⁰ is an apocalyptic number.

It is an amenable number.

549220 is an abundant number, since it is smaller than the sum of its proper divisors (769244).

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

549220 is a wasteful number, since it uses less digits than its factorization.

549220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 549220 is about 741.0937862376. The cubic root of 549220 is about 81.8933771852.

The spelling of 549220 in words is "five hundred forty-nine thousand, two hundred twenty".