550778 has 4 divisors (see below), whose sum is σ = 826170. Its totient is φ = 275388.

The previous prime is 550763. The next prime is 550789. The reversal of 550778 is 877055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877055 = 5 ⋅175411.

It can be written as a sum of positive squares in only one way, i.e., 368449 + 182329 = 607^2 + 427^2 .

It is an unprimeable 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, 137693 + ... + 137696.

2⁵⁵⁰⁷⁷⁸ is an apocalyptic number.

550778 is a deficient number, since it is larger than the sum of its proper divisors (275392).

550778 is a wasteful number, since it uses less digits than its factorization.

550778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275391.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 550778 is about 742.1441908416. The cubic root of 550778 is about 81.9707410980.

The spelling of 550778 in words is "five hundred fifty thousand, seven hundred seventy-eight".