28080186787 has 16 divisors (see below), whose sum is σ = 30116678400. Its totient is φ = 26122561920.

The previous prime is 28080186737. The next prime is 28080186817. The reversal of 28080186787 is 78768108082.

It is a cyclic number.

It is not a de Polignac number, because 28080186787 - 2¹¹ = 28080184739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28080186737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137673 + ... + 274069.

It is an arithmetic number, because the mean of its divisors is an integer number (1882292400).

Almost surely, 2^28080186787 is an apocalyptic number.

28080186787 is a deficient number, since it is larger than the sum of its proper divisors (2036491613).

28080186787 is a wasteful number, since it uses less digits than its factorization.

28080186787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136686.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 28080186787 in words is "twenty-eight billion, eighty million, one hundred eighty-six thousand, seven hundred eighty-seven".