549390 has 16 divisors (see below), whose sum is σ = 1318608. Its totient is φ = 146496.

The previous prime is 549379. The next prime is 549391. The reversal of 549390 is 93945.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 18313 = 549390 / (5 + 4 + 9 + 3 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9127 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (82413).

2⁵⁴⁹³⁹⁰ is an apocalyptic number.

549390 is an abundant number, since it is smaller than the sum of its proper divisors (769218).

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

549390 is a wasteful number, since it uses less digits than its factorization.

549390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18323.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 549390 is about 741.2084726985. The cubic root of 549390 is about 81.9018257959.

It can be divided in two parts, 549 and 390, that added together give a palindrome (939).

The spelling of 549390 in words is "five hundred forty-nine thousand, three hundred ninety".