550904 has 8 divisors (see below), whose sum is σ = 1032960. Its totient is φ = 275448.

The previous prime is 550903. The next prime is 550909. The reversal of 550904 is 409055.

550904 = 178² + 179² + ... + 193².

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 550904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34424 + ... + 34439.

It is an arithmetic number, because the mean of its divisors is an integer number (129120).

2⁵⁵⁰⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

550904 is a deficient number, since it is larger than the sum of its proper divisors (482056).

550904 is a wasteful number, since it uses less digits than its factorization.

550904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68869 (or 68865 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 550904 is about 742.2290751513. The cubic root of 550904 is about 81.9769913633.

Adding to 550904 its reverse (409055), we get a palindrome (959959).

The spelling of 550904 in words is "five hundred fifty thousand, nine hundred four".