550128 has 40 divisors (see below), whose sum is σ = 1449808. Its totient is φ = 179712.

The previous prime is 550127. The next prime is 550129. The reversal of 550128 is 821055.

It is an interprime number because it is at equal distance from previous prime (550127) and next prime (550129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426 + ... + 3582.

2⁵⁵⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724904).

550128 is an abundant number, since it is smaller than the sum of its proper divisors (899680).

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

550128 is a wasteful number, since it uses less digits than its factorization.

550128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 550128 is about 741.7061412716. The cubic root of 550128 is about 81.9384825139.

The spelling of 550128 in words is "five hundred fifty thousand, one hundred twenty-eight".