28144017 has 24 divisors (see below), whose sum is σ = 45995040. Its totient is φ = 17055360.

The previous prime is 28143971. The next prime is 28144033. The reversal of 28144017 is 71044182.

It is not a de Polignac number, because 28144017 - 2¹⁵ = 28111249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28144057) 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 23 ways as a sum of consecutive naturals, for example, 2592 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^28144017 is an apocalyptic number.

28144017 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28144017 is a deficient number, since it is larger than the sum of its proper divisors (17851023).

28144017 is a wasteful number, since it uses less digits than its factorization.

28144017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555 (or 10543 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 28144017 is about 5305.0934958773. The cubic root of 28144017 is about 304.1786266976.

Adding to 28144017 its reverse (71044182), we get a palindrome (99188199).

The spelling of 28144017 in words is "twenty-eight million, one hundred forty-four thousand, seventeen".