27928 has 8 divisors (see below), whose sum is σ = 52380. Its totient is φ = 13960.

The previous prime is 27919. The next prime is 27941. The reversal of 27928 is 82972.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 27896 and 27905.

It is a congruent number.

It is an unprimeable number.

27928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1738 + ... + 1753.

2²⁷⁹²⁸ is an apocalyptic number.

It is an amenable number.

27928 is a deficient number, since it is larger than the sum of its proper divisors (24452).

27928 is a wasteful number, since it uses less digits than its factorization.

27928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497 (or 3493 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 27928 is about 167.1167256740. The cubic root of 27928 is about 30.3398394717.

The spelling of 27928 in words is "twenty-seven thousand, nine hundred twenty-eight".