28058497857 has 12 divisors (see below), whose sum is σ = 43646552404. Its totient is φ = 17266767840.

The previous prime is 28058497837. The next prime is 28058497871. The reversal of 28058497857 is 75879485082.

It can be written as a sum of positive squares in 2 ways, for example, as 19416750336 + 8641747521 = 139344^2 + 92961^2 .

It is not a de Polignac number, because 28058497857 - 2¹⁰ = 28058496833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28058497794 and 28058497803.

It is not an unprimeable number, because it can be changed into a prime (28058497837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119907994 + ... + 119908227.

Almost surely, 2^28058497857 is an apocalyptic number.

It is an amenable number.

28058497857 is a deficient number, since it is larger than the sum of its proper divisors (15588054547).

28058497857 is a wasteful number, since it uses less digits than its factorization.

28058497857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239816240 (or 239816237 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 63.

The spelling of 28058497857 in words is "twenty-eight billion, fifty-eight million, four hundred ninety-seven thousand, eight hundred fifty-seven".