549111728 has 40 divisors (see below), whose sum is σ = 1176996096. Its totient is φ = 246075200.

The previous prime is 549111727. The next prime is 549111737. The reversal of 549111728 is 827111945.

It is a junction number, because it is equal to n+sod(n) for n = 549111691 and 549111700.

It is not an unprimeable number, because it can be changed into a prime (549111727) 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, 9476 + ... + 34467.

Almost surely, 2^549111728 is an apocalyptic number.

It is an amenable number.

549111728 is an abundant number, since it is smaller than the sum of its proper divisors (627884368).

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

549111728 is a wasteful number, since it uses less digits than its factorization.

549111728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44033 (or 44027 counting only the distinct ones).

The product of its digits is 20160, while the sum is 38.

The square root of 549111728 is about 23433.1331238484. The cubic root of 549111728 is about 818.8799540591.

The spelling of 549111728 in words is "five hundred forty-nine million, one hundred eleven thousand, seven hundred twenty-eight".