27768384220 has 24 divisors (see below), whose sum is σ = 59301975600. Its totient is φ = 10919092992.

The previous prime is 27768384029. The next prime is 27768384221. The reversal of 27768384220 is 2248386772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768384221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11765085 + ... + 11767444.

It is an arithmetic number, because the mean of its divisors is an integer number (2470915650).

Almost surely, 2^27768384220 is an apocalyptic number.

27768384220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27768384220 is an abundant number, since it is smaller than the sum of its proper divisors (31533591380).

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

27768384220 is a wasteful number, since it uses less digits than its factorization.

27768384220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23532597 (or 23532595 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 49.

The spelling of 27768384220 in words is "twenty-seven billion, seven hundred sixty-eight million, three hundred eighty-four thousand, two hundred twenty".