547561728 has 144 divisors (see below), whose sum is σ = 1850719360. Its totient is φ = 156432384.

The previous prime is 547561723. The next prime is 547561747. The reversal of 547561728 is 827165745.

547561728 is a `hidden beast` number, since 5 + 4 + 7 + 5 + 617 + 28 = 666.

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

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (547561723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42726 + ... + 54042.

Almost surely, 2^547561728 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 547561728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925359680).

547561728 is an abundant number, since it is smaller than the sum of its proper divisors (1303157632).

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

547561728 is a wasteful number, since it uses less digits than its factorization.

547561728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11349 (or 11329 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 547561728 is about 23400.0369230478. The cubic root of 547561728 is about 818.1087327040.

The spelling of 547561728 in words is "five hundred forty-seven million, five hundred sixty-one thousand, seven hundred twenty-eight".