27728587646 has 8 divisors (see below), whose sum is σ = 41633943624. Its totient is φ = 13850606440.

The previous prime is 27728587589. The next prime is 27728587657. The reversal of 27728587646 is 64678582772.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6841160 + ... + 6845211.

It is an arithmetic number, because the mean of its divisors is an integer number (5204242953).

Almost surely, 2^27728587646 is an apocalyptic number.

27728587646 is a deficient number, since it is larger than the sum of its proper divisors (13905355978).

27728587646 is a wasteful number, since it uses less digits than its factorization.

27728587646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13687386.

The product of its digits is 63221760, while the sum is 62.

The spelling of 27728587646 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, six hundred forty-six".