27686330440 has 16 divisors (see below), whose sum is σ = 62294243580. Its totient is φ = 11074532160.

The previous prime is 27686330417. The next prime is 27686330449. The reversal of 27686330440 is 4403368672.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27681638884 + 4691556 = 166378^2 + 2166^2 .

It is not an unprimeable number, because it can be changed into a prime (27686330449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346079091 + ... + 346079170.

Almost surely, 2^27686330440 is an apocalyptic number.

27686330440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27686330440 is an abundant number, since it is smaller than the sum of its proper divisors (34607913140).

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

27686330440 is a wasteful number, since it uses less digits than its factorization.

27686330440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692158272 (or 692158268 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 27686330440 in words is "twenty-seven billion, six hundred eighty-six million, three hundred thirty thousand, four hundred forty".