28057728395 has 4 divisors (see below), whose sum is σ = 33669274080. Its totient is φ = 22446182712.

The previous prime is 28057728343. The next prime is 28057728407. The reversal of 28057728395 is 59382775082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28057728395 - 2⁶ = 28057728331 is a prime.

It is a super-2 number, since 2×28057728395² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28057728395.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805772835 + ... + 2805772844.

It is an arithmetic number, because the mean of its divisors is an integer number (8417318520).

Almost surely, 2^28057728395 is an apocalyptic number.

28057728395 is a deficient number, since it is larger than the sum of its proper divisors (5611545685).

28057728395 is an equidigital number, since it uses as much as digits as its factorization.

28057728395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611545684.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 28057728395 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, three hundred ninety-five".