28144111 has 8 divisors (see below), whose sum is σ = 30913920. Its totient is φ = 25503192.

The previous prime is 28144093. The next prime is 28144139. The reversal of 28144111 is 11144182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28144111 - 2⁵ = 28144079 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 (28144811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31765 + ... + 32638.

It is an arithmetic number, because the mean of its divisors is an integer number (3864240).

Almost surely, 2^28144111 is an apocalyptic number.

28144111 is a deficient number, since it is larger than the sum of its proper divisors (2769809).

28144111 is a wasteful number, since it uses less digits than its factorization.

28144111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64445.

The product of its digits is 256, while the sum is 22.

The square root of 28144111 is about 5305.1023552802. The cubic root of 28144111 is about 304.1789653458.

Adding to 28144111 its reverse (11144182), we get a palindrome (39288293).

The spelling of 28144111 in words is "twenty-eight million, one hundred forty-four thousand, one hundred eleven".