28424163 has 4 divisors (see below), whose sum is σ = 37898888. Its totient is φ = 18949440.

The previous prime is 28424141. The next prime is 28424173. The reversal of 28424163 is 36142482.

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

It is not a de Polignac number, because 28424163 - 2⁵ = 28424131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28424163.

It is not an unprimeable number, because it can be changed into a prime (28424173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4737358 + ... + 4737363.

It is an arithmetic number, because the mean of its divisors is an integer number (9474722).

Almost surely, 2^28424163 is an apocalyptic number.

28424163 is a deficient number, since it is larger than the sum of its proper divisors (9474725).

28424163 is an equidigital number, since it uses as much as digits as its factorization.

28424163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474724.

The product of its digits is 9216, while the sum is 30.

The square root of 28424163 is about 5331.4316088645. The cubic root of 28424163 is about 305.1845626650.

The spelling of 28424163 in words is "twenty-eight million, four hundred twenty-four thousand, one hundred sixty-three".