27728745308 has 24 divisors (see below), whose sum is σ = 53117391600. Its totient is φ = 12560952320.

The previous prime is 27728745287. The next prime is 27728745311. The reversal of 27728745308 is 80354782772.

It is a self number, because there is not a number n which added to its sum of digits gives 27728745308.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1062533 + ... + 1088316.

It is an arithmetic number, because the mean of its divisors is an integer number (2213224650).

Almost surely, 2^27728745308 is an apocalyptic number.

It is an amenable number.

27728745308 is a deficient number, since it is larger than the sum of its proper divisors (25388646292).

27728745308 is a wasteful number, since it uses less digits than its factorization.

27728745308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151157 (or 2151155 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 27728745308 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, three hundred eight".