549440 has 56 divisors (see below), whose sum is σ = 1399032. Its totient is φ = 204800.

The previous prime is 549431. The next prime is 549443. The reversal of 549440 is 44945.

It can be written as a sum of positive squares in 4 ways, for example, as 262144 + 287296 = 512^2 + 536^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549440.

It is not an unprimeable number, because it can be changed into a prime (549443) by changing a digit.

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, 5390 + ... + 5490.

2⁵⁴⁹⁴⁴⁰ 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 549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699516).

549440 is an abundant number, since it is smaller than the sum of its proper divisors (849592).

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

549440 is a wasteful number, since it uses less digits than its factorization.

549440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 549440 is about 741.2422006335. The cubic root of 549440 is about 81.9043103497.

It can be divided in two parts, 549 and 440, that added together give a palindrome (989).

The spelling of 549440 in words is "five hundred forty-nine thousand, four hundred forty".