27891760992228 has 72 divisors (see below), whose sum is σ = 81373982639040. Its totient is φ = 7890172833600.

The previous prime is 27891760992209. The next prime is 27891760992257. The reversal of 27891760992228 is 82229906719872.

27891760992228 is a `hidden beast` number, since 2 + 7 + 8 + 9 + 1 + 7 + 609 + 9 + 2 + 2 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547903218 + ... + 547954121.

It is an arithmetic number, because the mean of its divisors is an integer number (1130194203320).

Almost surely, 2^{27891760992228} is an apocalyptic number.

27891760992228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27891760992228 is an abundant number, since it is smaller than the sum of its proper divisors (53482221646812).

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

27891760992228 is a wasteful number, since it uses less digits than its factorization.

27891760992228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095857457 (or 1095857452 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 72.

The spelling of 27891760992228 in words is "twenty-seven trillion, eight hundred ninety-one billion, seven hundred sixty million, nine hundred ninety-two thousand, two hundred twenty-eight".