28728730285746 has 32 divisors (see below), whose sum is σ = 57478564287168. Its totient is φ = 9572726473920.

The previous prime is 28728730285711. The next prime is 28728730285747. The reversal of 28728730285746 is 64758203782782.

It is a super-2 number, since 2×28728730285746² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28728730285747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588835965 + ... + 588884751.

It is an arithmetic number, because the mean of its divisors is an integer number (1796205133974).

Almost surely, 2^{28728730285746} is an apocalyptic number.

28728730285746 is an abundant number, since it is smaller than the sum of its proper divisors (28749834001422).

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

28728730285746 is a wasteful number, since it uses less digits than its factorization.

28728730285746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82826.

The product of its (nonzero) digits is 505774080, while the sum is 69.

The spelling of 28728730285746 in words is "twenty-eight trillion, seven hundred twenty-eight billion, seven hundred thirty million, two hundred eighty-five thousand, seven hundred forty-six".