28435930857 has 6 divisors (see below), whose sum is σ = 41074122362. Its totient is φ = 18957287232.

The previous prime is 28435930847. The next prime is 28435930867. The reversal of 28435930857 is 75803953482.

28435930857 is a `hidden beast` number, since 2 + 8 + 43 + 593 + 0 + 8 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (28435930847) and next prime (28435930867).

It can be written as a sum of positive squares in only one way, i.e., 16786830096 + 11649100761 = 129564^2 + 107931^2 .

It is not a de Polignac number, because 28435930857 - 2⁶ = 28435930793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28435930807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1579773928 + ... + 1579773945.

Almost surely, 2^28435930857 is an apocalyptic number.

It is an amenable number.

28435930857 is a deficient number, since it is larger than the sum of its proper divisors (12638191505).

28435930857 is a wasteful number, since it uses less digits than its factorization.

28435930857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159547879 (or 3159547876 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 28435930857 in words is "twenty-eight billion, four hundred thirty-five million, nine hundred thirty thousand, eight hundred fifty-seven".