27728588888 has 256 divisors, whose sum is σ = 74462976000. Its totient is φ = 9315901440.

The previous prime is 27728588887. The next prime is 27728588917. The reversal of 27728588888 is 88888582772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728588887) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20283581 + ... + 20284947.

It is an arithmetic number, because the mean of its divisors is an integer number (290871000).

Almost surely, 2^27728588888 is an apocalyptic number.

27728588888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27728588888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37231488000).

27728588888 is an abundant number, since it is smaller than the sum of its proper divisors (46734387112).

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

27728588888 is a wasteful number, since it uses less digits than its factorization.

27728588888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 1566 counting only the distinct ones).

The product of its digits is 256901120, while the sum is 71.

It can be divided in two parts, 27728 and 588888, that added together give a palindrome (616616).

The spelling of 27728588888 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred eighty-eight thousand, eight hundred eighty-eight".