27128655 has 32 divisors (see below), whose sum is σ = 48721920. Its totient is φ = 14320800.

The previous prime is 27128653. The next prime is 27128671. The reversal of 27128655 is 55682172.

It is a happy number.

It is not a de Polignac number, because 27128655 - 2¹ = 27128653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27128653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12930 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (1522560).

Almost surely, 2^27128655 is an apocalyptic number.

27128655 is a deficient number, since it is larger than the sum of its proper divisors (21593265).

27128655 is a wasteful number, since it uses less digits than its factorization.

27128655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2062 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 27128655 is about 5208.5175434091. The cubic root of 27128655 is about 300.4757451564.

The spelling of 27128655 in words is "twenty-seven million, one hundred twenty-eight thousand, six hundred fifty-five".