27855128 has 24 divisors (see below), whose sum is σ = 60756300. Its totient is φ = 11937744.

The previous prime is 27855089. The next prime is 27855133. The reversal of 27855128 is 82155872.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27855091 and 27855100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35138 + ... + 35921.

Almost surely, 2^27855128 is an apocalyptic number.

27855128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27855128 is an abundant number, since it is smaller than the sum of its proper divisors (32901172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27855128 is a wasteful number, since it uses less digits than its factorization.

27855128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71079 (or 71068 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 27855128 is about 5277.7957520162. The cubic root of 27855128 is about 303.1342809785.

The spelling of 27855128 in words is "twenty-seven million, eight hundred fifty-five thousand, one hundred twenty-eight".