27723957688 has 32 divisors (see below), whose sum is σ = 59611275360. Its totient is φ = 11841137280.

The previous prime is 27723957647. The next prime is 27723957691. The reversal of 27723957688 is 88675932772.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 828423 + ... + 861238.

It is an arithmetic number, because the mean of its divisors is an integer number (1862852355).

Almost surely, 2^27723957688 is an apocalyptic number.

27723957688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27723957688 is an abundant number, since it is smaller than the sum of its proper divisors (31887317672).

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

27723957688 is a wasteful number, since it uses less digits than its factorization.

27723957688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689967 (or 1689963 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 64.

The spelling of 27723957688 in words is "twenty-seven billion, seven hundred twenty-three million, nine hundred fifty-seven thousand, six hundred eighty-eight".