550040 has 16 divisors (see below), whose sum is σ = 1237680. Its totient is φ = 220000.

The previous prime is 550027. The next prime is 550049. The reversal of 550040 is 40055.

It is a junction number, because it is equal to n+sod(n) for n = 549997 and 550024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550049) by changing a digit.

550040 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, 6836 + ... + 6915.

It is an arithmetic number, because the mean of its divisors is an integer number (77355).

2⁵⁵⁰⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

550040 is an abundant number, since it is smaller than the sum of its proper divisors (687640).

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

550040 is a wasteful number, since it uses less digits than its factorization.

550040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13762 (or 13758 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 550040 is about 741.6468162138. The cubic root of 550040 is about 81.9341132453.

Adding to 550040 its reverse (40055), we get a palindrome (590095).

The spelling of 550040 in words is "five hundred fifty thousand, forty".