549378144 has 144 divisors (see below), whose sum is σ = 1810422432. Its totient is φ = 154773504.

The previous prime is 549378143. The next prime is 549378169. The reversal of 549378144 is 441873945.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 549378144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549378143) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 145302 + ... + 149034.

It is an arithmetic number, because the mean of its divisors is an integer number (12572378).

Almost surely, 2^549378144 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 549378144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905211216).

549378144 is an abundant number, since it is smaller than the sum of its proper divisors (1261044288).

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

549378144 is a wasteful number, since it uses less digits than its factorization.

549378144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829 (or 3818 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 549378144 is about 23438.8170349956. The cubic root of 549378144 is about 819.0123663641.

The spelling of 549378144 in words is "five hundred forty-nine million, three hundred seventy-eight thousand, one hundred forty-four".