549980 has 24 divisors (see below), whose sum is σ = 1170288. Its totient is φ = 217088.

The previous prime is 549979. The next prime is 550007. The reversal of 549980 is 89945.

It is a self number, because there is not a number n which added to its sum of digits gives 549980.

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 549980.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2012 + ... + 2268.

It is an arithmetic number, because the mean of its divisors is an integer number (48762).

2⁵⁴⁹⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

549980 is an abundant number, since it is smaller than the sum of its proper divisors (620308).

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

549980 is a wasteful number, since it uses less digits than its factorization.

549980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 549980 is about 741.6063645897. The cubic root of 549980 is about 81.9311339313.

Subtracting from 549980 its sum of digits (35), we obtain a palindrome (549945).

The spelling of 549980 in words is "five hundred forty-nine thousand, nine hundred eighty".