27943880688 has 80 divisors (see below), whose sum is σ = 80409808800. Its totient is φ = 9291340800.

The previous prime is 27943880683. The next prime is 27943880693. The reversal of 27943880688 is 88608834972.

It is an interprime number because it is at equal distance from previous prime (27943880683) and next prime (27943880693).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27943880681) 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 15 ways as a sum of consecutive naturals, for example, 92578 + ... + 253886.

It is an arithmetic number, because the mean of its divisors is an integer number (1005122610).

Almost surely, 2^27943880688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27943880688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40204904400).

27943880688 is an abundant number, since it is smaller than the sum of its proper divisors (52465928112).

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

27943880688 is a wasteful number, since it uses less digits than its factorization.

27943880688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161727 (or 161715 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 27943880688 in words is "twenty-seven billion, nine hundred forty-three million, eight hundred eighty thousand, six hundred eighty-eight".