549664 has 24 divisors (see below), whose sum is σ = 1099980. Its totient is φ = 270336.

The previous prime is 549649. The next prime is 549667. The reversal of 549664 is 466945.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 48400 = 708^2 + 220^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (549667) by changing a digit.

549664 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 3 ways as a sum of consecutive naturals, for example, 2752 + ... + 2944.

2⁵⁴⁹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

549664 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

549664 is a wasteful number, since it uses less digits than its factorization.

549664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 284 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 549664 is about 741.3932829477. The cubic root of 549664 is about 81.9154393009.

The spelling of 549664 in words is "five hundred forty-nine thousand, six hundred sixty-four".