549188640 has 768 divisors, whose sum is σ = 2601123840. Its totient is φ = 104509440.

The previous prime is 549188599. The next prime is 549188659. The reversal of 549188640 is 46881945.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4324257 + ... + 4324383.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^549188640 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 549188640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300561920).

549188640 is an abundant number, since it is smaller than the sum of its proper divisors (2051935200).

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

549188640 is a wasteful number, since it uses less digits than its factorization.

549188640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 549188640 is about 23434.7741614892. The cubic root of 549188640 is about 818.9181847454.

The spelling of 549188640 in words is "five hundred forty-nine million, one hundred eighty-eight thousand, six hundred forty".