27728744992 has 48 divisors (see below), whose sum is σ = 58809360960. Its totient is φ = 12793727232.

The previous prime is 27728744987. The next prime is 27728744993. The reversal of 27728744992 is 29944782772.

It is a self number, because there is not a number n which added to its sum of digits gives 27728744992.

It is not an unprimeable number, because it can be changed into a prime (27728744993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538143 + ... + 1556065.

It is an arithmetic number, because the mean of its divisors is an integer number (1225195020).

Almost surely, 2^27728744992 is an apocalyptic number.

It is an amenable number.

27728744992 is an abundant number, since it is smaller than the sum of its proper divisors (31080615968).

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

27728744992 is a wasteful number, since it uses less digits than its factorization.

27728744992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21665 (or 21657 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 61.

The spelling of 27728744992 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-four thousand, nine hundred ninety-two".