27728572768 has 48 divisors (see below), whose sum is σ = 59534153280. Its totient is φ = 12635790336.

The previous prime is 27728572757. The next prime is 27728572771. The reversal of 27728572768 is 86727582772.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389005 + ... + 454732.

It is an arithmetic number, because the mean of its divisors is an integer number (1240294860).

Almost surely, 2^27728572768 is an apocalyptic number.

It is an amenable number.

27728572768 is an abundant number, since it is smaller than the sum of its proper divisors (31805580512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27728572768 is a wasteful number, since it uses less digits than its factorization.

27728572768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843839 (or 843831 counting only the distinct ones).

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

It can be divided in two parts, 277285 and 72768, that added together give a palindrome (350053).

The spelling of 27728572768 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, seven hundred sixty-eight".