27784542720 has 480 divisors, whose sum is σ = 101097279360. Its totient is φ = 6497075200.

The previous prime is 27784542683. The next prime is 27784542743. The reversal of 27784542720 is 2724548772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 27784542720.

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, 26948605 + ... + 26949635.

It is an arithmetic number, because the mean of its divisors is an integer number (210619332).

Almost surely, 2^27784542720 is an apocalyptic number.

27784542720 is a gapful number since it is divisible by the number (20) 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 27784542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50548639680).

27784542720 is an abundant number, since it is smaller than the sum of its proper divisors (73312736640).

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

27784542720 is a wasteful number, since it uses less digits than its factorization.

27784542720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 48.

The spelling of 27784542720 in words is "twenty-seven billion, seven hundred eighty-four million, five hundred forty-two thousand, seven hundred twenty".