549728 has 24 divisors (see below), whose sum is σ = 1111320. Its totient is φ = 267520.

The previous prime is 549719. The next prime is 549733. The reversal of 549728 is 827945.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

549728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1103 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (46305).

2⁵⁴⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555660).

549728 is an abundant number, since it is smaller than the sum of its proper divisors (561592).

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

549728 is a wasteful number, since it uses less digits than its factorization.

549728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 462 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 549728 is about 741.4364436686. The cubic root of 549728 is about 81.9186184459.

The spelling of 549728 in words is "five hundred forty-nine thousand, seven hundred twenty-eight".