27728762247 has 12 divisors (see below), whose sum is σ = 40058065944. Its totient is φ = 18483344880.

The previous prime is 27728762227. The next prime is 27728762249. The reversal of 27728762247 is 74226782772.

27728762247 is a `hidden beast` number, since 2 + 7 + 7 + 2 + 8 + 7 + 622 + 4 + 7 = 666.

It is not a de Polignac number, because 27728762247 - 2¹² = 27728758151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27728762193 and 27728762202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728762249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136413 + ... + 272150.

It is an arithmetic number, because the mean of its divisors is an integer number (3338172162).

Almost surely, 2^27728762247 is an apocalyptic number.

27728762247 is a deficient number, since it is larger than the sum of its proper divisors (12329303697).

27728762247 is a wasteful number, since it uses less digits than its factorization.

27728762247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416110 (or 416107 counting only the distinct ones).

The product of its digits is 7375872, while the sum is 54.

The spelling of 27728762247 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred sixty-two thousand, two hundred forty-seven".