28057728851 has 2 divisors, whose sum is σ = 28057728852. Its totient is φ = 28057728850.

The previous prime is 28057728827. The next prime is 28057728859. The reversal of 28057728851 is 15882775082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28057728851 - 2³⁴ = 10877859667 is a prime.

It is a super-4 number, since 4×28057728851⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 28057728793 and 28057728802.

It is not a weakly prime, because it can be changed into another prime (28057728859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028864425 + 14028864426.

It is an arithmetic number, because the mean of its divisors is an integer number (14028864426).

Almost surely, 2^28057728851 is an apocalyptic number.

28057728851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057728851 is an equidigital number, since it uses as much as digits as its factorization.

28057728851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2508800, while the sum is 53.

The spelling of 28057728851 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, eight hundred fifty-one".