28127716 has 12 divisors (see below), whose sum is σ = 49408380. Its totient is φ = 14011040.

The previous prime is 28127699. The next prime is 28127717. The reversal of 28127716 is 61772182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9672100 + 18455616 = 3110^2 + 4296^2 .

It is not an unprimeable number, because it can be changed into a prime (28127717) 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 3 ways as a sum of consecutive naturals, for example, 11995 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (4117365).

Almost surely, 2^28127716 is an apocalyptic number.

It is an amenable number.

28127716 is a deficient number, since it is larger than the sum of its proper divisors (21280664).

28127716 is a wasteful number, since it uses less digits than its factorization.

28127716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26414 (or 26412 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 28127716 is about 5303.5569196531. The cubic root of 28127716 is about 304.1198886551.

Adding to 28127716 its reverse (61772182), we get a palindrome (89899898).

The spelling of 28127716 in words is "twenty-eight million, one hundred twenty-seven thousand, seven hundred sixteen".