28143359 has 4 divisors (see below), whose sum is σ = 28159560. Its totient is φ = 28127160.

The previous prime is 28143331. The next prime is 28143373. The reversal of 28143359 is 95334182.

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

It is a cyclic number.

It is not a de Polignac number, because 28143359 - 2⁸ = 28143103 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 (28143259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5132 + ... + 9089.

It is an arithmetic number, because the mean of its divisors is an integer number (7039890).

Almost surely, 2^28143359 is an apocalyptic number.

28143359 is a deficient number, since it is larger than the sum of its proper divisors (16201).

28143359 is a wasteful number, since it uses less digits than its factorization.

28143359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16200.

The product of its digits is 25920, while the sum is 35.

The square root of 28143359 is about 5305.0314796427. The cubic root of 28143359 is about 304.1762561394.

The spelling of 28143359 in words is "twenty-eight million, one hundred forty-three thousand, three hundred fifty-nine".