28676726991 has 24 divisors (see below), whose sum is σ = 47152250496. Its totient is φ = 16624188240.

The previous prime is 28676726971. The next prime is 28676726993. The reversal of 28676726991 is 19962767682.

28676726991 is a `hidden beast` number, since 286 + 7 + 6 + 7 + 269 + 91 = 666.

It is not a de Polignac number, because 28676726991 - 2⁵ = 28676726959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28676726993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6294765 + ... + 6299318.

It is an arithmetic number, because the mean of its divisors is an integer number (1964677104).

Almost surely, 2^28676726991 is an apocalyptic number.

28676726991 is a deficient number, since it is larger than the sum of its proper divisors (18475523505).

28676726991 is a wasteful number, since it uses less digits than its factorization.

28676726991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12594123 (or 12594120 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 28676726991 in words is "twenty-eight billion, six hundred seventy-six million, seven hundred twenty-six thousand, nine hundred ninety-one".