27128077 has 4 divisors (see below), whose sum is σ = 27168480. Its totient is φ = 27087676.

The previous prime is 27128033. The next prime is 27128083. The reversal of 27128077 is 77082172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27128077 - 2¹⁹ = 26603789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27129077) 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, 19177 + ... + 20542.

It is an arithmetic number, because the mean of its divisors is an integer number (6792120).

Almost surely, 2^27128077 is an apocalyptic number.

It is an amenable number.

27128077 is a deficient number, since it is larger than the sum of its proper divisors (40403).

27128077 is an equidigital number, since it uses as much as digits as its factorization.

27128077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40402.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 27128077 is about 5208.4620570760. The cubic root of 27128077 is about 300.4736111740.

The spelling of 27128077 in words is "twenty-seven million, one hundred twenty-eight thousand, seventy-seven".