28857545216 has 20 divisors (see below), whose sum is σ = 57658729062. Its totient is φ = 14428772352.

The previous prime is 28857545207. The next prime is 28857545219. The reversal of 28857545216 is 61254575882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25247938816 + 3609606400 = 158896^2 + 60080^2 .

It is not an unprimeable number, because it can be changed into a prime (28857545219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28180685 + ... + 28181708.

Almost surely, 2^28857545216 is an apocalyptic number.

It is an amenable number.

28857545216 is a deficient number, since it is larger than the sum of its proper divisors (28801183846).

28857545216 is an frugal number, since it uses more digits than its factorization.

28857545216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56362411 (or 56362395 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 53.

The spelling of 28857545216 in words is "twenty-eight billion, eight hundred fifty-seven million, five hundred forty-five thousand, two hundred sixteen".