550478320 has 160 divisors (see below), whose sum is σ = 1548472320. Its totient is φ = 177914880.

The previous prime is 550478311. The next prime is 550478321. The reversal of 550478320 is 23874055.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550478321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1017250 + ... + 1017790.

It is an arithmetic number, because the mean of its divisors is an integer number (9677952).

Almost surely, 2^550478320 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 550478320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774236160).

550478320 is an abundant number, since it is smaller than the sum of its proper divisors (997994000).

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

550478320 is a wasteful number, since it uses less digits than its factorization.

550478320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 550478320 is about 23462.2743995547. The cubic root of 550478320 is about 819.5587155688.

The spelling of 550478320 in words is "five hundred fifty million, four hundred seventy-eight thousand, three hundred twenty".