550279440 has 160 divisors (see below), whose sum is σ = 1903271040. Its totient is φ = 146133504.

The previous prime is 550279421. The next prime is 550279447. The reversal of 550279440 is 44972055.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 550279395 and 550279404.

It is not an unprimeable number, because it can be changed into a prime (550279447) 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, 805339 + ... + 806021.

It is an arithmetic number, because the mean of its divisors is an integer number (11895444).

Almost surely, 2^550279440 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 550279440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951635520).

550279440 is an abundant number, since it is smaller than the sum of its proper divisors (1352991600).

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

550279440 is a wasteful number, since it uses less digits than its factorization.

550279440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 550279440 is about 23458.0357233934. The cubic root of 550279440 is about 819.4600053717.

The spelling of 550279440 in words is "five hundred fifty million, two hundred seventy-nine thousand, four hundred forty".