28087206957808 has 40 divisors (see below), whose sum is σ = 55598794608128. Its totient is φ = 13742160509952.

The previous prime is 28087206957787. The next prime is 28087206957829. The reversal of 28087206957808 is 80875960278082.

It is an interprime number because it is at equal distance from previous prime (28087206957787) and next prime (28087206957829).

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, 94525941 + ... + 94822612.

Almost surely, 2^{28087206957808} is an apocalyptic number.

It is an amenable number.

28087206957808 is a deficient number, since it is larger than the sum of its proper divisors (27511587650320).

28087206957808 is a wasteful number, since it uses less digits than its factorization.

28087206957808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189348761 (or 189348755 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 70.

The spelling of 28087206957808 in words is "twenty-eight trillion, eighty-seven billion, two hundred six million, nine hundred fifty-seven thousand, eight hundred eight".