28055866136 has 32 divisors (see below), whose sum is σ = 52795098000. Its totient is φ = 13977254016.

The previous prime is 28055866121. The next prime is 28055866159. The reversal of 28055866136 is 63166855082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3232010 + ... + 3240678.

Almost surely, 2^28055866136 is an apocalyptic number.

It is an amenable number.

28055866136 is a deficient number, since it is larger than the sum of its proper divisors (24739231864).

28055866136 is a wasteful number, since it uses less digits than its factorization.

28055866136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091 (or 10087 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 28055866136 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-six thousand, one hundred thirty-six".