549444 has 48 divisors (see below), whose sum is σ = 1519616. Its totient is φ = 151200.

The previous prime is 549443. The next prime is 549449. The reversal of 549444 is 444945.

Its product of digits (11520) is a multiple of the sum of its prime factors (256).

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2499 + ... + 2709.

2⁵⁴⁹⁴⁴⁴ 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 549444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759808).

549444 is an abundant number, since it is smaller than the sum of its proper divisors (970172).

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

549444 is a wasteful number, since it uses less digits than its factorization.

549444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 254 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 549444 is about 741.2448988020. The cubic root of 549444 is about 81.9045091075.

The spelling of 549444 in words is "five hundred forty-nine thousand, four hundred forty-four".