542449728 has 42 divisors (see below), whose sum is σ = 1554835854. Its totient is φ = 180816384.

The previous prime is 542449703. The next prime is 542449729. The reversal of 542449728 is 827944245.

It can be written as a sum of positive squares in only one way, i.e., 516561984 + 25887744 = 22728^2 + 5088^2 .

It is not an unprimeable number, because it can be changed into a prime (542449729) 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 5 ways as a sum of consecutive naturals, for example, 470301 + ... + 471452.

Almost surely, 2^542449728 is an apocalyptic number.

It is an amenable number.

542449728 is an abundant number, since it is smaller than the sum of its proper divisors (1012386126).

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

542449728 is a wasteful number, since it uses less digits than its factorization.

542449728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941771 (or 941758 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 542449728 is about 23290.5501867174. The cubic root of 542449728 is about 815.5548321545.

The spelling of 542449728 in words is "five hundred forty-two million, four hundred forty-nine thousand, seven hundred twenty-eight".