28204163 has 8 divisors (see below), whose sum is σ = 30415056. Its totient is φ = 25999200.

The previous prime is 28204157. The next prime is 28204171. The reversal of 28204163 is 36140282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28204163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28204123) 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 7 ways as a sum of consecutive naturals, for example, 17168 + ... + 18738.

It is an arithmetic number, because the mean of its divisors is an integer number (3801882).

Almost surely, 2^28204163 is an apocalyptic number.

28204163 is a deficient number, since it is larger than the sum of its proper divisors (2210893).

28204163 is a wasteful number, since it uses less digits than its factorization.

28204163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28204163 is about 5310.7591736022. The cubic root of 28204163 is about 304.3951571526.

The spelling of 28204163 in words is "twenty-eight million, two hundred four thousand, one hundred sixty-three".