549408 has 48 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 178176.

The previous prime is 549403. The next prime is 549421. The reversal of 549408 is 804945.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (549403) by changing a digit.

549408 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5616 + ... + 5712.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2⁵⁴⁹⁴⁰⁸ 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 549408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740880).

549408 is an abundant number, since it is smaller than the sum of its proper divisors (932352).

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

549408 is a wasteful number, since it uses less digits than its factorization.

549408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 549408 is about 741.2206149319. The cubic root of 549408 is about 81.9027202527.

The spelling of 549408 in words is "five hundred forty-nine thousand, four hundred eight".