28836143 has 8 divisors (see below), whose sum is σ = 33011712. Its totient is φ = 24674616.

The previous prime is 28836139. The next prime is 28836149. The reversal of 28836143 is 34163882.

It is a happy number.

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 28836143 - 2² = 28836139 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 (28836149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346 + ... + 7712.

It is an arithmetic number, because the mean of its divisors is an integer number (4126464).

Almost surely, 2^28836143 is an apocalyptic number.

28836143 is a deficient number, since it is larger than the sum of its proper divisors (4175569).

28836143 is an equidigital number, since it uses as much as digits as its factorization.

28836143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021.

The product of its digits is 27648, while the sum is 35.

The square root of 28836143 is about 5369.9295153661. The cubic root of 28836143 is about 306.6519449192.

The spelling of 28836143 in words is "twenty-eight million, eight hundred thirty-six thousand, one hundred forty-three".