27728572770 has 96 divisors (see below), whose sum is σ = 73083995712. Its totient is φ = 7293077376.

The previous prime is 27728572757. The next prime is 27728572771. The reversal of 27728572770 is 7727582772.

27728572770 is a `hidden beast` number, since 277 + 285 + 7 + 27 + 70 = 666.

It is a super-2 number, since 2×27728572770² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27728572771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5054449 + ... + 5059931.

It is an arithmetic number, because the mean of its divisors is an integer number (761291622).

Almost surely, 2^27728572770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27728572770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36541997856).

27728572770 is an abundant number, since it is smaller than the sum of its proper divisors (45355422942).

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

27728572770 is a wasteful number, since it uses less digits than its factorization.

27728572770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256 (or 6253 counting only the distinct ones).

The product of its (nonzero) digits is 5378240, while the sum is 54.

The spelling of 27728572770 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, seven hundred seventy".