27928555 has 12 divisors (see below), whose sum is σ = 35038080. Its totient is φ = 21369392.

The previous prime is 27928529. The next prime is 27928597. The reversal of 27928555 is 55582972.

It is a de Polignac number, because none of the positive numbers 2^k-27928555 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2635 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (2919840).

Almost surely, 2^27928555 is an apocalyptic number.

27928555 is a deficient number, since it is larger than the sum of its proper divisors (7109525).

27928555 is a wasteful number, since it uses less digits than its factorization.

27928555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610 (or 10587 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The square root of 27928555 is about 5284.7473922601. The cubic root of 27928555 is about 303.4004044684.

The spelling of 27928555 in words is "twenty-seven million, nine hundred twenty-eight thousand, five hundred fifty-five".