549000 has 96 divisors (see below), whose sum is σ = 1886040. Its totient is φ = 144000.

The previous prime is 548963. The next prime is 549001. The reversal of 549000 is 945.

549000 = T₂₄ + T₂₅ + ... + T₁₄₈.

It can be written as a sum of positive squares in 4 ways, for example, as 39204 + 509796 = 198^2 + 714^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549000.

It is not an unprimeable number, because it can be changed into a prime (549001) 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 23 ways as a sum of consecutive naturals, for example, 8970 + ... + 9030.

2⁵⁴⁹⁰⁰⁰ is an apocalyptic number.

549000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943020).

549000 is an abundant number, since it is smaller than the sum of its proper divisors (1337040).

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

549000 is a wasteful number, since it uses less digits than its factorization.

549000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 549000 is about 740.9453421137. The cubic root of 549000 is about 81.8824411006.

Adding to 549000 its reverse (945), we get a palindrome (549945).

The spelling of 549000 in words is "five hundred forty-nine thousand".