549988 has 12 divisors (see below), whose sum is σ = 967680. Its totient is φ = 273512.

The previous prime is 549979. The next prime is 550007. The reversal of 549988 is 889945.

It is a happy number.

It is an unprimeable number.

549988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1245 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2⁵⁴⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

549988 is a deficient number, since it is larger than the sum of its proper divisors (417692).

549988 is a wasteful number, since it uses less digits than its factorization.

549988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 744 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 549988 is about 741.6117582671. The cubic root of 549988 is about 81.9315311857.

Subtracting from 549988 its sum of digits (43), we obtain a palindrome (549945).

The spelling of 549988 in words is "five hundred forty-nine thousand, nine hundred eighty-eight".