549318 has 64 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 134400.

The previous prime is 549313. The next prime is 549319. The reversal of 549318 is 813945.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549318.

It is not an unprimeable number, because it can be changed into a prime (549313) by changing a digit.

549318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13378 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁵⁴⁹³¹⁸ is an apocalyptic number.

549318 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 549318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).

549318 is an abundant number, since it is smaller than the sum of its proper divisors (902202).

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

549318 is a wasteful number, since it uses less digits than its factorization.

549318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93.

The product of its digits is 4320, while the sum is 30.

The square root of 549318 is about 741.1599017756. The cubic root of 549318 is about 81.8982477736.

The spelling of 549318 in words is "five hundred forty-nine thousand, three hundred eighteen".