27128851 has 4 divisors (see below), whose sum is σ = 27342592. Its totient is φ = 26915112.

The previous prime is 27128831. The next prime is 27128867. The reversal of 27128851 is 15882172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27128851 - 2⁷ = 27128723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27128831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106680 + ... + 106933.

It is an arithmetic number, because the mean of its divisors is an integer number (6835648).

Almost surely, 2^27128851 is an apocalyptic number.

27128851 is a deficient number, since it is larger than the sum of its proper divisors (213741).

27128851 is a wasteful number, since it uses less digits than its factorization.

27128851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213740.

The product of its digits is 8960, while the sum is 34.

The square root of 27128851 is about 5208.5363587096. The cubic root of 27128851 is about 300.4764687836.

The spelling of 27128851 in words is "twenty-seven million, one hundred twenty-eight thousand, eight hundred fifty-one".