550445420 has 72 divisors (see below), whose sum is σ = 1359983520. Its totient is φ = 186574080.

The previous prime is 550445419. The next prime is 550445437. The reversal of 550445420 is 24544055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84065 + ... + 90375.

It is an arithmetic number, because the mean of its divisors is an integer number (18888660).

Almost surely, 2^550445420 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 550445420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679991760).

550445420 is an abundant number, since it is smaller than the sum of its proper divisors (809538100).

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

550445420 is a wasteful number, since it uses less digits than its factorization.

550445420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6414 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 550445420 is about 23461.5732635303. The cubic root of 550445420 is about 819.5423879388.

Adding to 550445420 its reverse (24544055), we get a palindrome (574989475).

The spelling of 550445420 in words is "five hundred fifty million, four hundred forty-five thousand, four hundred twenty".