27728587687 has 8 divisors (see below), whose sum is σ = 28937147904. Its totient is φ = 26520274968.

The previous prime is 27728587657. The next prime is 27728587703. The reversal of 27728587687 is 78678582772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27728587687 - 2¹¹ = 27728585639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728587657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188718 + ... + 301780.

It is an arithmetic number, because the mean of its divisors is an integer number (3617143488).

Almost surely, 2^27728587687 is an apocalyptic number.

27728587687 is a deficient number, since it is larger than the sum of its proper divisors (1208560217).

27728587687 is a wasteful number, since it uses less digits than its factorization.

27728587687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123749.

The product of its digits is 147517440, while the sum is 67.

The spelling of 27728587687 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, six hundred eighty-seven".