550134640 has 80 divisors (see below), whose sum is σ = 1443523680. Its totient is φ = 193141760.

The previous prime is 550134623. The next prime is 550134659. The reversal of 550134640 is 46431055.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 550134599 and 550134608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14742 + ... + 36298.

It is an arithmetic number, because the mean of its divisors is an integer number (18044046).

Almost surely, 2^550134640 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 550134640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721761840).

550134640 is an abundant number, since it is smaller than the sum of its proper divisors (893389040).

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

550134640 is a wasteful number, since it uses less digits than its factorization.

550134640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21610 (or 21604 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 550134640 is about 23454.9491579070. The cubic root of 550134640 is about 819.3881217616.

Adding to 550134640 its reverse (46431055), we get a palindrome (596565695).

The spelling of 550134640 in words is "five hundred fifty million, one hundred thirty-four thousand, six hundred forty".