549890 has 16 divisors (see below), whose sum is σ = 1080000. Its totient is φ = 199920.

The previous prime is 549883. The next prime is 549911. The reversal of 549890 is 98945.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 549890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (67500).

2⁵⁴⁹⁸⁹⁰ is an apocalyptic number.

549890 is a deficient number, since it is larger than the sum of its proper divisors (530110).

549890 is a wasteful number, since it uses less digits than its factorization.

549890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017.

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

The square root of 549890 is about 741.5456830162. The cubic root of 549890 is about 81.9266645541.

The spelling of 549890 in words is "five hundred forty-nine thousand, eight hundred ninety".