305606728 has 24 divisors (see below), whose sum is σ = 666566550. Its totient is φ = 130974144.

The previous prime is 305606699. The next prime is 305606729. The reversal of 305606728 is 827606503.

305606728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 271524484 + 34082244 = 16478^2 + 5838^2 .

It is not an unprimeable number, because it can be changed into a prime (305606729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389413 + ... + 390196.

Almost surely, 2^305606728 is an apocalyptic number.

It is an amenable number.

305606728 is an abundant number, since it is smaller than the sum of its proper divisors (360959822).

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

305606728 is a wasteful number, since it uses less digits than its factorization.

305606728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779629 (or 779618 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 305606728 is about 17481.6111385650. The cubic root of 305606728 is about 673.5776013619.

The spelling of 305606728 in words is "three hundred five million, six hundred six thousand, seven hundred twenty-eight".