28677171 has 4 divisors (see below), whose sum is σ = 38236232. Its totient is φ = 19118112.

The previous prime is 28677169. The next prime is 28677179. The reversal of 28677171 is 17177682.

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

It is not a de Polignac number, because 28677171 - 2¹ = 28677169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28677179) 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, 4779526 + ... + 4779531.

It is an arithmetic number, because the mean of its divisors is an integer number (9559058).

Almost surely, 2^28677171 is an apocalyptic number.

28677171 is a deficient number, since it is larger than the sum of its proper divisors (9559061).

28677171 is an equidigital number, since it uses as much as digits as its factorization.

28677171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9559060.

The product of its digits is 32928, while the sum is 39.

The square root of 28677171 is about 5355.1070017321. The cubic root of 28677171 is about 306.0873880020.

The spelling of 28677171 in words is "twenty-eight million, six hundred seventy-seven thousand, one hundred seventy-one".