549871728 has 120 divisors (see below), whose sum is σ = 1659425040. Its totient is φ = 156441600.

The previous prime is 549871727. The next prime is 549871739. The reversal of 549871728 is 827178945.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549871727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914628 + ... + 915228.

It is an arithmetic number, because the mean of its divisors is an integer number (13828542).

Almost surely, 2^549871728 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 549871728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829712520).

549871728 is an abundant number, since it is smaller than the sum of its proper divisors (1109553312).

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

549871728 is a wasteful number, since it uses less digits than its factorization.

549871728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1002 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The square root of 549871728 is about 23449.3438714178. The cubic root of 549871728 is about 819.2575711162.

The spelling of 549871728 in words is "five hundred forty-nine million, eight hundred seventy-one thousand, seven hundred twenty-eight".