28974163 has 4 divisors (see below), whose sum is σ = 28989640. Its totient is φ = 28958688.

The previous prime is 28974157. The next prime is 28974203. The reversal of 28974163 is 36147982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28974163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28974763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4470 + ... + 8827.

It is an arithmetic number, because the mean of its divisors is an integer number (7247410).

Almost surely, 2^28974163 is an apocalyptic number.

28974163 is a deficient number, since it is larger than the sum of its proper divisors (15477).

28974163 is a wasteful number, since it uses less digits than its factorization.

28974163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15476.

The product of its digits is 72576, while the sum is 40.

The square root of 28974163 is about 5382.7653673553. The cubic root of 28974163 is about 307.1404147118.

The spelling of 28974163 in words is "twenty-eight million, nine hundred seventy-four thousand, one hundred sixty-three".