28113458787 has 12 divisors (see below), whose sum is σ = 40754933440. Its totient is φ = 18674642448.

The previous prime is 28113458783. The next prime is 28113458801. The reversal of 28113458787 is 78785431182.

28113458787 is a `hidden beast` number, since 2 + 8 + 113 + 458 + 78 + 7 = 666.

It is not a de Polignac number, because 28113458787 - 2² = 28113458783 is a prime.

It is a super-2 number, since 2×28113458787² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28113458783) 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, 5635987 + ... + 5640972.

Almost surely, 2^28113458787 is an apocalyptic number.

28113458787 is a deficient number, since it is larger than the sum of its proper divisors (12641474653).

28113458787 is a wasteful number, since it uses less digits than its factorization.

28113458787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11277242 (or 11277239 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The spelling of 28113458787 in words is "twenty-eight billion, one hundred thirteen million, four hundred fifty-eight thousand, seven hundred eighty-seven".