28127771 has 16 divisors (see below), whose sum is σ = 34402560. Its totient is φ = 22459680.

The previous prime is 28127753. The next prime is 28127779. The reversal of 28127771 is 17772182.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28127771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28127779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6380 + ... + 9846.

It is an arithmetic number, because the mean of its divisors is an integer number (2150160).

Almost surely, 2^28127771 is an apocalyptic number.

28127771 is a deficient number, since it is larger than the sum of its proper divisors (6274789).

28127771 is a wasteful number, since it uses less digits than its factorization.

28127771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554.

The product of its digits is 10976, while the sum is 35.

The square root of 28127771 is about 5303.5621048499. The cubic root of 28127771 is about 304.1200868769.

The spelling of 28127771 in words is "twenty-eight million, one hundred twenty-seven thousand, seven hundred seventy-one".