27878720072 has 32 divisors (see below), whose sum is σ = 62337513600. Its totient is φ = 11428543104.

The previous prime is 27878720071. The next prime is 27878720101. The reversal of 27878720072 is 27002787872.

It is a self number, because there is not a number n which added to its sum of digits gives 27878720072.

It is not an unprimeable number, because it can be changed into a prime (27878720071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10821197 + ... + 10823772.

It is an arithmetic number, because the mean of its divisors is an integer number (1948047300).

Almost surely, 2^27878720072 is an apocalyptic number.

It is an amenable number.

27878720072 is an abundant number, since it is smaller than the sum of its proper divisors (34458793528).

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

27878720072 is a wasteful number, since it uses less digits than its factorization.

27878720072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21645005 (or 21645001 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 50.

The spelling of 27878720072 in words is "twenty-seven billion, eight hundred seventy-eight million, seven hundred twenty thousand, seventy-two".