549520 has 20 divisors (see below), whose sum is σ = 1277820. Its totient is φ = 219776.

The previous prime is 549517. The next prime is 549533. The reversal of 549520 is 25945.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 473344 = 276^2 + 688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3355 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (63891).

2⁵⁴⁹⁵²⁰ is an apocalyptic number.

It is an amenable number.

549520 is an abundant number, since it is smaller than the sum of its proper divisors (728300).

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

549520 is a wasteful number, since it uses less digits than its factorization.

549520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6882 (or 6876 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 549520 is about 741.2961621376. The cubic root of 549520 is about 81.9082853223.

The spelling of 549520 in words is "five hundred forty-nine thousand, five hundred twenty".