549128640 has 112 divisors (see below), whose sum is σ = 1761756192. Its totient is φ = 144900096.

The previous prime is 549128627. The next prime is 549128647. The reversal of 549128640 is 46821945.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549128647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90172 + ... + 96068.

It is an arithmetic number, because the mean of its divisors is an integer number (15729966).

Almost surely, 2^549128640 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 549128640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880878096).

549128640 is an abundant number, since it is smaller than the sum of its proper divisors (1212627552).

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

549128640 is a wasteful number, since it uses less digits than its factorization.

549128640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014 (or 6004 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 549128640 is about 23433.4939776381. The cubic root of 549128640 is about 818.8883608215. Note that the first 3 decimals are identical.

The spelling of 549128640 in words is "five hundred forty-nine million, one hundred twenty-eight thousand, six hundred forty".