549557380 has 24 divisors (see below), whose sum is σ = 1165972248. Its totient is φ = 217555968.

The previous prime is 549557369. The next prime is 549557389. The reversal of 549557380 is 83755945.

It can be written as a sum of positive squares in 4 ways, for example, as 14930496 + 534626884 = 3864^2 + 23122^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 549557380.

It is not an unprimeable number, because it can be changed into a prime (549557389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139699 + ... + 143578.

It is an arithmetic number, because the mean of its divisors is an integer number (48582177).

Almost surely, 2^549557380 is an apocalyptic number.

It is an amenable number.

549557380 is an abundant number, since it is smaller than the sum of its proper divisors (616414868).

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

549557380 is a wasteful number, since it uses less digits than its factorization.

549557380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283383 (or 283381 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The square root of 549557380 is about 23442.6402096692. The cubic root of 549557380 is about 819.1014249605.

The spelling of 549557380 in words is "five hundred forty-nine million, five hundred fifty-seven thousand, three hundred eighty".