28144123 has 8 divisors (see below), whose sum is σ = 33274080. Its totient is φ = 23291520.

The previous prime is 28144093. The next prime is 28144139. The reversal of 28144123 is 32144182.

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

It is not a de Polignac number, because 28144123 - 2⁵ = 28144091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28144183) 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, 69118 + ... + 69523.

It is an arithmetic number, because the mean of its divisors is an integer number (4159260).

Almost surely, 2^28144123 is an apocalyptic number.

28144123 is a deficient number, since it is larger than the sum of its proper divisors (5129957).

28144123 is a wasteful number, since it uses less digits than its factorization.

28144123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138677.

The product of its digits is 1536, while the sum is 25.

The square root of 28144123 is about 5305.1034862668. The cubic root of 28144123 is about 304.1790085774.

The spelling of 28144123 in words is "twenty-eight million, one hundred forty-four thousand, one hundred twenty-three".