27720002856 has 192 divisors, whose sum is σ = 86953910400. Its totient is φ = 7299113472.

The previous prime is 27720002839. The next prime is 27720002867. The reversal of 27720002856 is 65820002772.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14048686 + ... + 14050658.

It is an arithmetic number, because the mean of its divisors is an integer number (452884950).

Almost surely, 2^27720002856 is an apocalyptic number.

27720002856 is a gapful number since it is divisible by the number (26) 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 27720002856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43476955200).

27720002856 is an abundant number, since it is smaller than the sum of its proper divisors (59233907544).

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

27720002856 is a wasteful number, since it uses less digits than its factorization.

27720002856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928 (or 2917 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 27720002856 in words is "twenty-seven billion, seven hundred twenty million, two thousand, eight hundred fifty-six".