549066138 has 8 divisors (see below), whose sum is σ = 1098132288. Its totient is φ = 183022044.

The previous prime is 549066127. The next prime is 549066157. The reversal of 549066138 is 831660945.

It is a sphenic number, since it is the product of 3 distinct primes.

549066138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 549066138.

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 3 ways as a sum of consecutive naturals, for example, 45755506 + ... + 45755517.

It is an arithmetic number, because the mean of its divisors is an integer number (137266536).

Almost surely, 2^549066138 is an apocalyptic number.

549066138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

549066138 is a wasteful number, since it uses less digits than its factorization.

549066138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91511028.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 549066138 is about 23432.1603357437. The cubic root of 549066138 is about 818.8572909297.

The spelling of 549066138 in words is "five hundred forty-nine million, sixty-six thousand, one hundred thirty-eight".