550646 has 4 divisors (see below), whose sum is σ = 825972. Its totient is φ = 275322.

The previous prime is 550637. The next prime is 550651. The reversal of 550646 is 646055.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×550646² = 606422034632, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

550646 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137660 + ... + 137663.

It is an arithmetic number, because the mean of its divisors is an integer number (206493).

2⁵⁵⁰⁶⁴⁶ is an apocalyptic number.

550646 is a deficient number, since it is larger than the sum of its proper divisors (275326).

550646 is a wasteful number, since it uses less digits than its factorization.

550646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275325.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 550646 is about 742.0552540074. The cubic root of 550646 is about 81.9641921785.

The spelling of 550646 in words is "five hundred fifty thousand, six hundred forty-six".