549668 has 24 divisors (see below), whose sum is σ = 1119552. Its totient is φ = 231264.

The previous prime is 549667. The next prime is 549683. The reversal of 549668 is 866945.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (549667) 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, 1730 + ... + 2022.

It is an arithmetic number, because the mean of its divisors is an integer number (46648).

2⁵⁴⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

549668 is an abundant number, since it is smaller than the sum of its proper divisors (569884).

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

549668 is a wasteful number, since it uses less digits than its factorization.

549668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 369 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 549668 is about 741.3959805664. The cubic root of 549668 is about 81.9156380047.

The spelling of 549668 in words is "five hundred forty-nine thousand, six hundred sixty-eight".