27728575808 has 28 divisors (see below), whose sum is σ = 55114618752. Its totient is φ = 13841427840.

The previous prime is 27728575801. The next prime is 27728575811. The reversal of 27728575808 is 80857582772.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728575801) 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, 318038 + ... + 395733.

Almost surely, 2^27728575808 is an apocalyptic number.

It is an amenable number.

27728575808 is a deficient number, since it is larger than the sum of its proper divisors (27386042944).

27728575808 is an equidigital number, since it uses as much as digits as its factorization.

27728575808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714390 (or 714380 counting only the distinct ones).

The product of its (nonzero) digits is 17561600, while the sum is 59.

The spelling of 27728575808 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-five thousand, eight hundred eight".