27870128 has 60 divisors (see below), whose sum is σ = 63855288. Its totient is φ = 11681280.

The previous prime is 27870113. The next prime is 27870133. The reversal of 27870128 is 82107872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29276 + ... + 30212.

Almost surely, 2^27870128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27870128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31927644).

27870128 is an abundant number, since it is smaller than the sum of its proper divisors (35985160).

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

27870128 is a wasteful number, since it uses less digits than its factorization.

27870128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 27870128 is about 5279.2166085509. The cubic root of 27870128 is about 303.1886838670.

The spelling of 27870128 in words is "twenty-seven million, eight hundred seventy thousand, one hundred twenty-eight".