28840163 has 8 divisors (see below), whose sum is σ = 31504896. Its totient is φ = 26182600.

The previous prime is 28840153. The next prime is 28840193. The reversal of 28840163 is 36104882.

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 28840163 - 2⁶ = 28840099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28840153) 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, 10070 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (3938112).

Almost surely, 2^28840163 is an apocalyptic number.

28840163 is a deficient number, since it is larger than the sum of its proper divisors (2664733).

28840163 is a wasteful number, since it uses less digits than its factorization.

28840163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28840163 is about 5370.3038089106. The cubic root of 28840163 is about 306.6661942074. Note that the first 3 decimals are identical.

The spelling of 28840163 in words is "twenty-eight million, eight hundred forty thousand, one hundred sixty-three".