27728600087 has 4 divisors (see below), whose sum is σ = 27753970440. Its totient is φ = 27703229736.

The previous prime is 27728600083. The next prime is 27728600113. The reversal of 27728600087 is 78000682772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27728600087 - 2² = 27728600083 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 (27728600083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12683537 + ... + 12685722.

It is an arithmetic number, because the mean of its divisors is an integer number (6938492610).

Almost surely, 2^27728600087 is an apocalyptic number.

27728600087 is a deficient number, since it is larger than the sum of its proper divisors (25370353).

27728600087 is a wasteful number, since it uses less digits than its factorization.

27728600087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25370352.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 27728600087 in words is "twenty-seven billion, seven hundred twenty-eight million, six hundred thousand, eighty-seven".