550428 has 12 divisors (see below), whose sum is σ = 1284360. Its totient is φ = 183472.

The previous prime is 550427. The next prime is 550439. The reversal of 550428 is 824055.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 550398 and 550407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22923 + ... + 22946.

It is an arithmetic number, because the mean of its divisors is an integer number (107030).

2⁵⁵⁰⁴²⁸ is an apocalyptic number.

It is an amenable number.

550428 is an abundant number, since it is smaller than the sum of its proper divisors (733932).

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

550428 is a wasteful number, since it uses less digits than its factorization.

550428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45876 (or 45874 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 550428 is about 741.9083501350. The cubic root of 550428 is about 81.9533742468.

The spelling of 550428 in words is "five hundred fifty thousand, four hundred twenty-eight".