27877728228 has 24 divisors (see below), whose sum is σ = 74340608832. Its totient is φ = 7965065184.

The previous prime is 27877728139. The next prime is 27877728247. The reversal of 27877728228 is 82282777872.

It is a happy 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, 165938775 + ... + 165938942.

It is an arithmetic number, because the mean of its divisors is an integer number (3097525368).

Almost surely, 2^27877728228 is an apocalyptic number.

27877728228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27877728228 is an abundant number, since it is smaller than the sum of its proper divisors (46462880604).

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

27877728228 is a wasteful number, since it uses less digits than its factorization.

27877728228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331877731 (or 331877729 counting only the distinct ones).

The product of its digits is 19668992, while the sum is 60.

The spelling of 27877728228 in words is "twenty-seven billion, eight hundred seventy-seven million, seven hundred twenty-eight thousand, two hundred twenty-eight".