27728572786 has 8 divisors (see below), whose sum is σ = 41841918720. Its totient is φ = 13781266548.

The previous prime is 27728572771. The next prime is 27728572841. The reversal of 27728572786 is 68727582772.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41509506 + ... + 41510173.

It is an arithmetic number, because the mean of its divisors is an integer number (5230239840).

Almost surely, 2^27728572786 is an apocalyptic number.

27728572786 is a deficient number, since it is larger than the sum of its proper divisors (14113345934).

27728572786 is a wasteful number, since it uses less digits than its factorization.

27728572786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83019848.

The product of its digits is 36879360, while the sum is 61.

The spelling of 27728572786 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, seven hundred eighty-six".