28300057508 has 12 divisors (see below), whose sum is σ = 51232862940. Its totient is φ = 13662096672.

The previous prime is 28300057493. The next prime is 28300057517. The reversal of 28300057508 is 80575000382.

It can be written as a sum of positive squares in 2 ways, for example, as 20630151424 + 7669906084 = 143632^2 + 87578^2 .

It is a super-2 number, since 2×28300057508² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121982891 + ... + 121983122.

It is an arithmetic number, because the mean of its divisors is an integer number (4269405245).

Almost surely, 2^28300057508 is an apocalyptic number.

It is an amenable number.

28300057508 is a deficient number, since it is larger than the sum of its proper divisors (22932805432).

28300057508 is a wasteful number, since it uses less digits than its factorization.

28300057508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243966046 (or 243966044 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 28300057508 in words is "twenty-eight billion, three hundred million, fifty-seven thousand, five hundred eight".