549558090 has 192 divisors, whose sum is σ = 1597190400. Its totient is φ = 130470912.

The previous prime is 549558047. The next prime is 549558131. The reversal of 549558090 is 90855945.

549558090 is a `hidden beast` number, since 5 + 4 + 9 + 558 + 0 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3500292 + ... + 3500448.

It is an arithmetic number, because the mean of its divisors is an integer number (8318700).

Almost surely, 2^549558090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549558090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798595200).

549558090 is an abundant number, since it is smaller than the sum of its proper divisors (1047632310).

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

549558090 is a wasteful number, since it uses less digits than its factorization.

549558090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 549558090 is about 23442.6553530098. The cubic root of 549558090 is about 819.1017777060.

The spelling of 549558090 in words is "five hundred forty-nine million, five hundred fifty-eight thousand, ninety".